21174402902 has 16 divisors (see below), whose sum is σ = 33493325040. Its totient is φ = 10011963168.

The previous prime is 21174402877. The next prime is 21174402911. The reversal of 21174402902 is 20920447112.

It is a happy number.

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, 479033 + ... + 521364.

It is an arithmetic number, because the mean of its divisors is an integer number (2093332815).

Almost surely, 2^21174402902 is an apocalyptic number.

21174402902 is a deficient number, since it is larger than the sum of its proper divisors (12318922138).

21174402902 is a wasteful number, since it uses less digits than its factorization.

21174402902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000975.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 21174402902 in words is "twenty-one billion, one hundred seventy-four million, four hundred two thousand, nine hundred two".