21470610665564 has 24 divisors (see below), whose sum is σ = 37602406077600. Its totient is φ = 10727067813120.

The previous prime is 21470610665531. The next prime is 21470610665573. The reversal of 21470610665564 is 46556601607412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50230184 + ... + 50655824.

It is an arithmetic number, because the mean of its divisors is an integer number (1566766919900).

Almost surely, 2^{21470610665564} is an apocalyptic number.

It is an amenable number.

21470610665564 is a deficient number, since it is larger than the sum of its proper divisors (16131795412036).

21470610665564 is a wasteful number, since it uses less digits than its factorization.

21470610665564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435293 (or 435291 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 21470610665564 in words is "twenty-one trillion, four hundred seventy billion, six hundred ten million, six hundred sixty-five thousand, five hundred sixty-four".