21866689423586 has 32 divisors (see below), whose sum is σ = 37925960476032. Its totient is φ = 9261802609920.

The previous prime is 21866689423541. The next prime is 21866689423609. The reversal of 21866689423586 is 68532498666812.

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, 16705751 + ... + 17967066.

It is an arithmetic number, because the mean of its divisors is an integer number (1185186264876).

Almost surely, 2^{21866689423586} is an apocalyptic number.

21866689423586 is a deficient number, since it is larger than the sum of its proper divisors (16059271052446).

21866689423586 is a wasteful number, since it uses less digits than its factorization.

21866689423586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34673354.

The product of its digits is 1433272320, while the sum is 74.

The spelling of 21866689423586 in words is "twenty-one trillion, eight hundred sixty-six billion, six hundred eighty-nine million, four hundred twenty-three thousand, five hundred eighty-six".