21993782592 has 56 divisors (see below), whose sum is σ = 58230670432. Its totient is φ = 7326374400.

The previous prime is 21993782581. The next prime is 21993782597. The reversal of 21993782592 is 29528739912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21993782597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256542 + ... + 331362.

Almost surely, 2^21993782592 is an apocalyptic number.

It is an amenable number.

21993782592 is an abundant number, since it is smaller than the sum of its proper divisors (36236887840).

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

21993782592 is a wasteful number, since it uses less digits than its factorization.

21993782592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76367 (or 76357 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 57.

The spelling of 21993782592 in words is "twenty-one billion, nine hundred ninety-three million, seven hundred eighty-two thousand, five hundred ninety-two".