25240142920 has 32 divisors (see below), whose sum is σ = 57509193600. Its totient is φ = 9968257728.

The previous prime is 25240142909. The next prime is 25240142927. The reversal of 25240142920 is 2924104252.

It is a super-2 number, since 2×25240142920² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25240142927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3990534 + ... + 3996853.

It is an arithmetic number, because the mean of its divisors is an integer number (1797162300).

Almost surely, 2^25240142920 is an apocalyptic number.

25240142920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25240142920 is an abundant number, since it is smaller than the sum of its proper divisors (32269050680).

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

25240142920 is a wasteful number, since it uses less digits than its factorization.

25240142920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7987477 (or 7987473 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 25240142920 in words is "twenty-five billion, two hundred forty million, one hundred forty-two thousand, nine hundred twenty".