25420232520 has 96 divisors (see below), whose sum is σ = 82647040320. Its totient is φ = 6776161920.

The previous prime is 25420232491. The next prime is 25420232527. The reversal of 25420232520 is 2523202452.

25420232520 is a `hidden beast` number, since 2 + 5 + 420 + 232 + 5 + 2 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (25420232527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1057677 + ... + 1081443.

It is an arithmetic number, because the mean of its divisors is an integer number (860906670).

Almost surely, 2^25420232520 is an apocalyptic number.

25420232520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25420232520 is an abundant number, since it is smaller than the sum of its proper divisors (57226807800).

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

25420232520 is a wasteful number, since it uses less digits than its factorization.

25420232520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26755 (or 26748 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 25420232520 its reverse (2523202452), we get a palindrome (27943434972).

The spelling of 25420232520 in words is "twenty-five billion, four hundred twenty million, two hundred thirty-two thousand, five hundred twenty".