21025470101908 has 12 divisors (see below), whose sum is σ = 38394336708000. Its totient is φ = 10055659613912.

The previous prime is 21025470101851. The next prime is 21025470101917. The reversal of 21025470101908 is 80910107452012.

It is a congruent number.

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, 114268859158 + ... + 114268859341.

It is an arithmetic number, because the mean of its divisors is an integer number (3199528059000).

Almost surely, 2^{21025470101908} is an apocalyptic number.

It is an amenable number.

21025470101908 is a deficient number, since it is larger than the sum of its proper divisors (17368866606092).

21025470101908 is a wasteful number, since it uses less digits than its factorization.

21025470101908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228537718526 (or 228537718524 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 21025470101908 in words is "twenty-one trillion, twenty-five billion, four hundred seventy million, one hundred one thousand, nine hundred eight".