21321974606 has 16 divisors (see below), whose sum is σ = 32182239600. Its totient is φ = 10594752000.

The previous prime is 21321974593. The next prime is 21321974647. The reversal of 21321974606 is 60647912312.

It is a congruent number.

It is an unprimeable number.

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, 178100 + ... + 272696.

It is an arithmetic number, because the mean of its divisors is an integer number (2011389975).

Almost surely, 2^21321974606 is an apocalyptic number.

21321974606 is a deficient number, since it is larger than the sum of its proper divisors (10860264994).

21321974606 is a wasteful number, since it uses less digits than its factorization.

21321974606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95299.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 21321974606 in words is "twenty-one billion, three hundred twenty-one million, nine hundred seventy-four thousand, six hundred six".