21499932955266 has 16 divisors (see below), whose sum is σ = 47777628789600. Its totient is φ = 7166644318404.

The previous prime is 21499932955213. The next prime is 21499932955279. The reversal of 21499932955266 is 66255923999412.

21499932955266 is a `hidden beast` number, since 2 + 1 + 4 + 9 + 9 + 9 + 3 + 2 + 9 + 552 + 66 = 666.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21499932955194 and 21499932955203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199073453236 + ... + 199073453343.

It is an arithmetic number, because the mean of its divisors is an integer number (2986101799350).

Almost surely, 2^{21499932955266} is an apocalyptic number.

21499932955266 is an abundant number, since it is smaller than the sum of its proper divisors (26277695834334).

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

21499932955266 is a wasteful number, since it uses less digits than its factorization.

21499932955266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398146906590 (or 398146906584 counting only the distinct ones).

The product of its digits is 566870400, while the sum is 72.

The spelling of 21499932955266 in words is "twenty-one trillion, four hundred ninety-nine billion, nine hundred thirty-two million, nine hundred fifty-five thousand, two hundred sixty-six".