25913700020 has 24 divisors (see below), whose sum is σ = 58604829864. Its totient is φ = 9568135296.

The previous prime is 25913699909. The next prime is 25913700103. The reversal of 25913700020 is 2000731952.

It can be written as a sum of positive squares in 4 ways, for example, as 5109676324 + 20804023696 = 71482^2 + 144236^2 .

It is a congruent number.

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, 49833779 + ... + 49834298.

It is an arithmetic number, because the mean of its divisors is an integer number (2441867911).

Almost surely, 2^25913700020 is an apocalyptic number.

25913700020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25913700020 is an abundant number, since it is smaller than the sum of its proper divisors (32691129844).

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

25913700020 is a wasteful number, since it uses less digits than its factorization.

25913700020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99668099 (or 99668097 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The spelling of 25913700020 in words is "twenty-five billion, nine hundred thirteen million, seven hundred thousand, twenty".