21507460044664 has 32 divisors (see below), whose sum is σ = 44738168054400. Its totient is φ = 9610421281120.

The previous prime is 21507460044617. The next prime is 21507460044677. The reversal of 21507460044664 is 46644006470512.

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, 2071206292 + ... + 2071216675.

It is an arithmetic number, because the mean of its divisors is an integer number (1398067751700).

Almost surely, 2^{21507460044664} is an apocalyptic number.

It is an amenable number.

21507460044664 is an abundant number, since it is smaller than the sum of its proper divisors (23230708009736).

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

21507460044664 is a wasteful number, since it uses less digits than its factorization.

21507460044664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142423043 (or 4142423039 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 21507460044664 in words is "twenty-one trillion, five hundred seven billion, four hundred sixty million, forty-four thousand, six hundred sixty-four".