21383952582 has 32 divisors (see below), whose sum is σ = 44156934144. Its totient is φ = 6896577600.

The previous prime is 21383952529. The next prime is 21383952599. The reversal of 21383952582 is 28525938312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1164738 + ... + 1182954.

It is an arithmetic number, because the mean of its divisors is an integer number (1379904192).

Almost surely, 2^21383952582 is an apocalyptic number.

21383952582 is an abundant number, since it is smaller than the sum of its proper divisors (22772981562).

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

21383952582 is a wasteful number, since it uses less digits than its factorization.

21383952582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24564.

The product of its digits is 1036800, while the sum is 48.

The spelling of 21383952582 in words is "twenty-one billion, three hundred eighty-three million, nine hundred fifty-two thousand, five hundred eighty-two".