21232876166 has 16 divisors (see below), whose sum is σ = 32765334624. Its totient is φ = 10312066944.

The previous prime is 21232876111. The next prime is 21232876183. The reversal of 21232876166 is 66167823212.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 198050 + ... + 285813.

It is an arithmetic number, because the mean of its divisors is an integer number (2047833414).

Almost surely, 2^21232876166 is an apocalyptic number.

21232876166 is a deficient number, since it is larger than the sum of its proper divisors (11532458458).

21232876166 is a wasteful number, since it uses less digits than its factorization.

21232876166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484495.

The product of its digits is 290304, while the sum is 44.

The spelling of 21232876166 in words is "twenty-one billion, two hundred thirty-two million, eight hundred seventy-six thousand, one hundred sixty-six".