21100238538604 has 48 divisors (see below), whose sum is σ = 39585126439936. Its totient is φ = 9823514500800.

The previous prime is 21100238538563. The next prime is 21100238538649. The reversal of 21100238538604 is 40683583200112.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 15 ways as a sum of consecutive naturals, for example, 29174727 + ... + 29889214.

Almost surely, 2^{21100238538604} is an apocalyptic number.

It is an amenable number.

21100238538604 is a deficient number, since it is larger than the sum of its proper divisors (18484887901332).

21100238538604 is a wasteful number, since it uses less digits than its factorization.

21100238538604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59064086 (or 59064084 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 21100238538604 in words is "twenty-one trillion, one hundred billion, two hundred thirty-eight million, five hundred thirty-eight thousand, six hundred four".