21910552312 has 16 divisors (see below), whose sum is σ = 44817039000. Its totient is φ = 9959341920.

The previous prime is 21910552273. The next prime is 21910552333. The reversal of 21910552312 is 21325501912.

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, 124491687 + ... + 124491862.

Almost surely, 2^21910552312 is an apocalyptic number.

21910552312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21910552312 is an abundant number, since it is smaller than the sum of its proper divisors (22906486688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21910552312 is a wasteful number, since it uses less digits than its factorization.

21910552312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248983566 (or 248983562 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 21910552312 in words is "twenty-one billion, nine hundred ten million, five hundred fifty-two thousand, three hundred twelve".