21968805902 has 16 divisors (see below), whose sum is σ = 34701432480. Its totient is φ = 10410424992.

The previous prime is 21968805893. The next prime is 21968805913. The reversal of 21968805902 is 20950886912.

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, 2185733 + ... + 2195760.

It is an arithmetic number, because the mean of its divisors is an integer number (2168839530).

Almost surely, 2^21968805902 is an apocalyptic number.

21968805902 is a deficient number, since it is larger than the sum of its proper divisors (12732626578).

21968805902 is a wasteful number, since it uses less digits than its factorization.

21968805902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381627.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 21968805902 in words is "twenty-one billion, nine hundred sixty-eight million, eight hundred five thousand, nine hundred two".