21662013652554 has 32 divisors (see below), whose sum is σ = 47262755116224. Its totient is φ = 6564221578880.

The previous prime is 21662013652541. The next prime is 21662013652561. The reversal of 21662013652554 is 45525631026612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24368332 + ... + 25241624.

It is an arithmetic number, because the mean of its divisors is an integer number (1476961097382).

Almost surely, 2^{21662013652554} is an apocalyptic number.

21662013652554 is an abundant number, since it is smaller than the sum of its proper divisors (25600741463670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21662013652554 is a wasteful number, since it uses less digits than its factorization.

21662013652554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249142.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 21662013652554 in words is "twenty-one trillion, six hundred sixty-two billion, thirteen million, six hundred fifty-two thousand, five hundred fifty-four".