20454260 has 36 divisors (see below), whose sum is σ = 45349668. Its totient is φ = 7748352.

The previous prime is 20454257. The next prime is 20454263. The reversal of 20454260 is 6245402.

It is an interprime number because it is at equal distance from previous prime (20454257) and next prime (20454263).

It can be written as a sum of positive squares in 2 ways, for example, as 7695076 + 12759184 = 2774^2 + 3572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5804 + ... + 8636.

It is an arithmetic number, because the mean of its divisors is an integer number (1259713).

Almost surely, 2^20454260 is an apocalyptic number.

20454260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20454260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22674834).

20454260 is an abundant number, since it is smaller than the sum of its proper divisors (24895408).

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

20454260 is a wasteful number, since it uses less digits than its factorization.

20454260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880 (or 2859 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20454260 is about 4522.6386103690. The cubic root of 20454260 is about 273.4814815893.

Adding to 20454260 its reverse (6245402), we get a palindrome (26699662).

The spelling of 20454260 in words is "twenty million, four hundred fifty-four thousand, two hundred sixty".