21966020902 has 16 divisors (see below), whose sum is σ = 37657949472. Its totient is φ = 9413530560.

The previous prime is 21966020861. The next prime is 21966020911. The reversal of 21966020902 is 20902066912.

21966020902 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 472752 + ... + 517132.

It is an arithmetic number, because the mean of its divisors is an integer number (2353621842).

Almost surely, 2^21966020902 is an apocalyptic number.

21966020902 is a deficient number, since it is larger than the sum of its proper divisors (15691928570).

21966020902 is a wasteful number, since it uses less digits than its factorization.

21966020902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79743.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 21966020902 in words is "twenty-one billion, nine hundred sixty-six million, twenty thousand, nine hundred two".