21382627984 has 45 divisors (see below), whose sum is σ = 41888304003. Its totient is φ = 10574039136.

The previous prime is 21382627979. The next prime is 21382627993. The reversal of 21382627984 is 48972628312.

The square root of 21382627984 is 146228.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 81302637 + ... + 81302899.

Almost surely, 2^21382627984 is an apocalyptic number.

21382627984 is the 146228-th square number.

It is an amenable number.

21382627984 is a deficient number, since it is larger than the sum of its proper divisors (20505676019).

21382627984 is an frugal number, since it uses more digits than its factorization.

21382627984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 404 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The spelling of 21382627984 in words is "twenty-one billion, three hundred eighty-two million, six hundred twenty-seven thousand, nine hundred eighty-four".