21690766935630 has 96 divisors (see below), whose sum is σ = 60736579577856. Its totient is φ = 5339051891712.

The previous prime is 21690766935599. The next prime is 21690766935653. The reversal of 21690766935630 is 3653966709612.

21690766935630 is a `hidden beast` number, since 2 + 1 + 6 + 9 + 0 + 7 + 6 + 69 + 3 + 563 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29913139 + ... + 30629681.

It is an arithmetic number, because the mean of its divisors is an integer number (632672703936).

Almost surely, 2^{21690766935630} is an apocalyptic number.

21690766935630 is an abundant number, since it is smaller than the sum of its proper divisors (39045812642226).

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

21690766935630 is a wasteful number, since it uses less digits than its factorization.

21690766935630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742442 (or 742439 counting only the distinct ones).

The product of its (nonzero) digits is 66134880, while the sum is 63.

The spelling of 21690766935630 in words is "twenty-one trillion, six hundred ninety billion, seven hundred sixty-six million, nine hundred thirty-five thousand, six hundred thirty".