25275818020 has 12 divisors (see below), whose sum is σ = 53079217884. Its totient is φ = 10110327200.

The previous prime is 25275818017. The next prime is 25275818111. The reversal of 25275818020 is 2081857252.

It can be written as a sum of positive squares in 2 ways, for example, as 9211776484 + 16064041536 = 95978^2 + 126744^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631895431 + ... + 631895470.

It is an arithmetic number, because the mean of its divisors is an integer number (4423268157).

Almost surely, 2^25275818020 is an apocalyptic number.

25275818020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25275818020 is an abundant number, since it is smaller than the sum of its proper divisors (27803399864).

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

25275818020 is a wasteful number, since it uses less digits than its factorization.

25275818020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263790910 (or 1263790908 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The spelling of 25275818020 in words is "twenty-five billion, two hundred seventy-five million, eight hundred eighteen thousand, twenty".