21589743364 has 24 divisors (see below), whose sum is σ = 43221835328. Its totient is φ = 9243672480.

The previous prime is 21589743347. The next prime is 21589743391. The reversal of 21589743364 is 46334798512.

It is a happy number.

It is a super-2 number, since 2×21589743364² (a number of 21 digits) contains 22 as substring.

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, 349014 + ... + 406189.

Almost surely, 2^21589743364 is an apocalyptic number.

It is an amenable number.

21589743364 is an abundant number, since it is smaller than the sum of its proper divisors (21632091964).

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

21589743364 is a wasteful number, since it uses less digits than its factorization.

21589743364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756235 (or 756233 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The spelling of 21589743364 in words is "twenty-one billion, five hundred eighty-nine million, seven hundred forty-three thousand, three hundred sixty-four".