21886657136 has 20 divisors (see below), whose sum is σ = 42430264200. Its totient is φ = 10936911552.

The previous prime is 21886657049. The next prime is 21886657159. The reversal of 21886657136 is 63175668812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372866 + ... + 427553.

It is an arithmetic number, because the mean of its divisors is an integer number (2121513210).

Almost surely, 2^21886657136 is an apocalyptic number.

It is an amenable number.

21886657136 is a deficient number, since it is larger than the sum of its proper divisors (20543607064).

21886657136 is a wasteful number, since it uses less digits than its factorization.

21886657136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802136 (or 802130 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The spelling of 21886657136 in words is "twenty-one billion, eight hundred eighty-six million, six hundred fifty-seven thousand, one hundred thirty-six".