21911902466 has 16 divisors (see below), whose sum is σ = 33911913600. Its totient is φ = 10613164848.

The previous prime is 21911902417. The next prime is 21911902489. The reversal of 21911902466 is 66420911912.

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, 1299956 + ... + 1316703.

It is an arithmetic number, because the mean of its divisors is an integer number (2119494600).

Almost surely, 2^21911902466 is an apocalyptic number.

21911902466 is a deficient number, since it is larger than the sum of its proper divisors (12000011134).

21911902466 is a wasteful number, since it uses less digits than its factorization.

21911902466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616793.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 21911902466 in words is "twenty-one billion, nine hundred eleven million, nine hundred two thousand, four hundred sixty-six".