21377626468 has 48 divisors (see below), whose sum is σ = 41914998720. Its totient is φ = 9457712000.

The previous prime is 21377626451. The next prime is 21377626471. The reversal of 21377626468 is 86462677312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221430 + ... + 302962.

It is an arithmetic number, because the mean of its divisors is an integer number (873229140).

Almost surely, 2^21377626468 is an apocalyptic number.

It is an amenable number.

21377626468 is a deficient number, since it is larger than the sum of its proper divisors (20537372252).

21377626468 is a wasteful number, since it uses less digits than its factorization.

21377626468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81708 (or 81706 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 52.

The spelling of 21377626468 in words is "twenty-one billion, three hundred seventy-seven million, six hundred twenty-six thousand, four hundred sixty-eight".