21332607959 has 32 divisors (see below), whose sum is σ = 24111622080. Its totient is φ = 18737123328.

The previous prime is 21332607953. The next prime is 21332607973. The reversal of 21332607959 is 95970623312.

It is a cyclic number.

It is not a de Polignac number, because 21332607959 - 2¹⁶ = 21332542423 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332607953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21058337 + ... + 21059349.

It is an arithmetic number, because the mean of its divisors is an integer number (753488190).

Almost surely, 2^21332607959 is an apocalyptic number.

21332607959 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21332607959 is a deficient number, since it is larger than the sum of its proper divisors (2779014121).

21332607959 is a wasteful number, since it uses less digits than its factorization.

21332607959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811.

The product of its (nonzero) digits is 612360, while the sum is 47.

The spelling of 21332607959 in words is "twenty-one billion, three hundred thirty-two million, six hundred seven thousand, nine hundred fifty-nine".