21993534792 has 48 divisors (see below), whose sum is σ = 60144152640. Its totient is φ = 7259999328.

The previous prime is 21993534781. The next prime is 21993534821. The reversal of 21993534792 is 29743539912.

21993534792 is a `hidden beast` number, since 2 + 19 + 9 + 3 + 534 + 7 + 92 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1475428 + ... + 1490259.

It is an arithmetic number, because the mean of its divisors is an integer number (1253003180).

Almost surely, 2^21993534792 is an apocalyptic number.

It is an amenable number.

21993534792 is an abundant number, since it is smaller than the sum of its proper divisors (38150617848).

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

21993534792 is a wasteful number, since it uses less digits than its factorization.

21993534792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965802 (or 2965795 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The spelling of 21993534792 in words is "twenty-one billion, nine hundred ninety-three million, five hundred thirty-four thousand, seven hundred ninety-two".