21579701232106 has 8 divisors (see below), whose sum is σ = 32369612095044. Its totient is φ = 10789830533760.

The previous prime is 21579701232101. The next prime is 21579701232107. The reversal of 21579701232106 is 60123210797512.

It can be written as a sum of positive squares in 2 ways, for example, as 13888181089225 + 7691520142881 = 3726685^2 + 2773359^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21579701232101) 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, 8659945 + ... + 10869868.

Almost surely, 2^{21579701232106} is an apocalyptic number.

21579701232106 is a deficient number, since it is larger than the sum of its proper divisors (10789910862938).

21579701232106 is a wasteful number, since it uses less digits than its factorization.

21579701232106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20082296.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 21579701232106 in words is "twenty-one trillion, five hundred seventy-nine billion, seven hundred one million, two hundred thirty-two thousand, one hundred six".