21536200392 has 32 divisors (see below), whose sum is σ = 61532001600. Its totient is φ = 6153200064.

The previous prime is 21536200379. The next prime is 21536200403. The reversal of 21536200392 is 29300263512.

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, 64095667 + ... + 64096002.

It is an arithmetic number, because the mean of its divisors is an integer number (1922875050).

Almost surely, 2^21536200392 is an apocalyptic number.

It is an amenable number.

21536200392 is an abundant number, since it is smaller than the sum of its proper divisors (39995801208).

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

21536200392 is a wasteful number, since it uses less digits than its factorization.

21536200392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128191685 (or 128191681 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The spelling of 21536200392 in words is "twenty-one billion, five hundred thirty-six million, two hundred thousand, three hundred ninety-two".