25518980 has 24 divisors (see below), whose sum is σ = 53692800. Its totient is φ = 10188000.

The previous prime is 25518953. The next prime is 25518991. The reversal of 25518980 is 8981552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14171 + ... + 15869.

It is an arithmetic number, because the mean of its divisors is an integer number (2237200).

Almost surely, 2^25518980 is an apocalyptic number.

25518980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25518980 is an abundant number, since it is smaller than the sum of its proper divisors (28173820).

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

25518980 is a wasteful number, since it uses less digits than its factorization.

25518980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459 (or 2457 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 25518980 is about 5051.6314196505. The cubic root of 25518980 is about 294.4112744038.

The spelling of 25518980 in words is "twenty-five million, five hundred eighteen thousand, nine hundred eighty".