21590693232 has 20 divisors (see below), whose sum is σ = 55775957640. Its totient is φ = 7196897728.

The previous prime is 21590693231. The next prime is 21590693273. The reversal of 21590693232 is 23239609512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21590693231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224903007 + ... + 224903102.

It is an arithmetic number, because the mean of its divisors is an integer number (2788797882).

Almost surely, 2^21590693232 is an apocalyptic number.

It is an amenable number.

21590693232 is an abundant number, since it is smaller than the sum of its proper divisors (34185264408).

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

21590693232 is a wasteful number, since it uses less digits than its factorization.

21590693232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449806120 (or 449806114 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The spelling of 21590693232 in words is "twenty-one billion, five hundred ninety million, six hundred ninety-three thousand, two hundred thirty-two".