21627683558 has 16 divisors (see below), whose sum is σ = 34942106976. Its totient is φ = 9980556480.

The previous prime is 21627683537. The next prime is 21627683591. The reversal of 21627683558 is 85538672612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133535 + ... + 247157.

It is an arithmetic number, because the mean of its divisors is an integer number (2183881686).

Almost surely, 2^21627683558 is an apocalyptic number.

21627683558 is a deficient number, since it is larger than the sum of its proper divisors (13314423418).

21627683558 is a wasteful number, since it uses less digits than its factorization.

21627683558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120959.

The product of its digits is 4838400, while the sum is 53.

The spelling of 21627683558 in words is "twenty-one billion, six hundred twenty-seven million, six hundred eighty-three thousand, five hundred fifty-eight".