21951283886016 has 112 divisors (see below), whose sum is σ = 59116335513600. Its totient is φ = 7187602867200.

The previous prime is 21951283886003. The next prime is 21951283886069. The reversal of 21951283886016 is 61068838215912.

It is a congruent number.

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, 1993816 + ... + 6919383.

Almost surely, 2^{21951283886016} is an apocalyptic number.

It is an amenable number.

21951283886016 is an abundant number, since it is smaller than the sum of its proper divisors (37165051627584).

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

21951283886016 is a wasteful number, since it uses less digits than its factorization.

21951283886016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8913442 (or 8913432 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 21951283886016 in words is "twenty-one trillion, nine hundred fifty-one billion, two hundred eighty-three million, eight hundred eighty-six thousand, sixteen".