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20260 = 2251013
BaseRepresentation
bin100111100100100
31000210101
410330210
51122020
6233444
7113032
oct47444
930711
1020260
1114249
12b884
1392b6
147552
15600a
hex4f24

20260 has 12 divisors (see below), whose sum is σ = 42588. Its totient is φ = 8096.

The previous prime is 20249. The next prime is 20261. The reversal of 20260 is 6202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2304 + 17956 = 48^2 + 134^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an Ulam number.

It is a plaindrome in base 6.

It is a nialpdrome in base 12 and base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487 + ... + 526.

It is an arithmetic number, because the mean of its divisors is an integer number (3549).

220260 is an apocalyptic number.

20260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20260 is an abundant number, since it is smaller than the sum of its proper divisors (22328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21294).

20260 is a wasteful number, since it uses less digits than its factorization.

20260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20260 is about 142.3376267893. The cubic root of 20260 is about 27.2612948716.

Adding to 20260 its reverse (6202), we get a palindrome (26462).

It can be divided in two parts, 202 and 60, that added together give a palindrome (262).

The spelling of 20260 in words is "twenty thousand, two hundred sixty".

Divisors: 1 2 4 5 10 20 1013 2026 4052 5065 10130 20260