21596724159 has 8 divisors (see below), whose sum is σ = 28800568752. Its totient is φ = 14395347840.

The previous prime is 21596724109. The next prime is 21596724169. The reversal of 21596724159 is 95142769512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21596724159 - 2²⁴ = 21579946943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21596724109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596554 + ... + 631719.

It is an arithmetic number, because the mean of its divisors is an integer number (3600071094).

Almost surely, 2^21596724159 is an apocalyptic number.

21596724159 is a deficient number, since it is larger than the sum of its proper divisors (7203844593).

21596724159 is a wasteful number, since it uses less digits than its factorization.

21596724159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234137.

The product of its digits is 1360800, while the sum is 51.

The spelling of 21596724159 in words is "twenty-one billion, five hundred ninety-six million, seven hundred twenty-four thousand, one hundred fifty-nine".