20263120 has 40 divisors (see below), whose sum is σ = 49595040. Its totient is φ = 7678080.

The previous prime is 20263109. The next prime is 20263123. The reversal of 20263120 is 2136202.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20263094 and 20263103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5146 + ... + 8185.

It is an arithmetic number, because the mean of its divisors is an integer number (1239876).

Almost surely, 2^20263120 is an apocalyptic number.

20263120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20263120 is an abundant number, since it is smaller than the sum of its proper divisors (29331920).

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

20263120 is a wasteful number, since it uses less digits than its factorization.

20263120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13363 (or 13357 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20263120 is about 4501.4575417302. The cubic root of 20263120 is about 272.6269419501.

Adding to 20263120 its reverse (2136202), we get a palindrome (22399322).

The spelling of 20263120 in words is "twenty million, two hundred sixty-three thousand, one hundred twenty".