21663456022 has 16 divisors (see below), whose sum is σ = 36123679872. Its totient is φ = 9675984960.

The previous prime is 21663456011. The next prime is 21663456041. The reversal of 21663456022 is 22065436612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13438063 + ... + 13439674.

It is an arithmetic number, because the mean of its divisors is an integer number (2257729992).

Almost surely, 2^21663456022 is an apocalyptic number.

21663456022 is a deficient number, since it is larger than the sum of its proper divisors (14460223850).

21663456022 is a wasteful number, since it uses less digits than its factorization.

21663456022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26877783.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 21663456022 in words is "twenty-one billion, six hundred sixty-three million, four hundred fifty-six thousand, twenty-two".