25921020804 has 24 divisors (see below), whose sum is σ = 69122722368. Its totient is φ = 7406005920.

The previous prime is 25921020803. The next prime is 25921020809. The reversal of 25921020804 is 40802012952.

It is not an unprimeable number, because it can be changed into a prime (25921020803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154291707 + ... + 154291874.

It is an arithmetic number, because the mean of its divisors is an integer number (2880113432).

Almost surely, 2^25921020804 is an apocalyptic number.

It is an amenable number.

25921020804 is an abundant number, since it is smaller than the sum of its proper divisors (43201701564).

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

25921020804 is a wasteful number, since it uses less digits than its factorization.

25921020804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308583595 (or 308583593 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 25921020804 in words is "twenty-five billion, nine hundred twenty-one million, twenty thousand, eight hundred four".