21115000392 has 32 divisors (see below), whose sum is σ = 52840507200. Its totient is φ = 7031265984.

The previous prime is 21115000381. The next prime is 21115000411. The reversal of 21115000392 is 29300051112.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 417292 + ... + 465147.

It is an arithmetic number, because the mean of its divisors is an integer number (1651265850).

Almost surely, 2^21115000392 is an apocalyptic number.

It is an amenable number.

21115000392 is an abundant number, since it is smaller than the sum of its proper divisors (31725506808).

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

21115000392 is a wasteful number, since it uses less digits than its factorization.

21115000392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883445 (or 883441 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The spelling of 21115000392 in words is "twenty-one billion, one hundred fifteen million, three hundred ninety-two", and thus it is an aban number.