21377326118 has 32 divisors (see below), whose sum is σ = 33384349152. Its totient is φ = 10258790400.

The previous prime is 21377326097. The next prime is 21377326129. The reversal of 21377326118 is 81162377312.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1633730 + ... + 1646762.

It is an arithmetic number, because the mean of its divisors is an integer number (1043260911).

Almost surely, 2^21377326118 is an apocalyptic number.

21377326118 is a deficient number, since it is larger than the sum of its proper divisors (12007023034).

21377326118 is a wasteful number, since it uses less digits than its factorization.

21377326118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13400.

The product of its digits is 84672, while the sum is 41.

The spelling of 21377326118 in words is "twenty-one billion, three hundred seventy-seven million, three hundred twenty-six thousand, one hundred eighteen".