21866673986 has 32 divisors (see below), whose sum is σ = 33798851328. Its totient is φ = 10604215440.

The previous prime is 21866673977. The next prime is 21866674003. The reversal of 21866673986 is 68937666812.

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, 9924761 + ... + 9926963.

It is an arithmetic number, because the mean of its divisors is an integer number (1056214104).

Almost surely, 2^21866673986 is an apocalyptic number.

21866673986 is a deficient number, since it is larger than the sum of its proper divisors (11932177342).

21866673986 is a wasteful number, since it uses less digits than its factorization.

21866673986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006.

The product of its digits is 31352832, while the sum is 62.

The spelling of 21866673986 in words is "twenty-one billion, eight hundred sixty-six million, six hundred seventy-three thousand, nine hundred eighty-six".