21322169766 has 12 divisors (see below), whose sum is σ = 46198034532. Its totient is φ = 7107389916.

The previous prime is 21322169723. The next prime is 21322169773. The reversal of 21322169766 is 66796122312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 592282476 + ... + 592282511.

It is an arithmetic number, because the mean of its divisors is an integer number (3849836211).

Almost surely, 2^21322169766 is an apocalyptic number.

21322169766 is an abundant number, since it is smaller than the sum of its proper divisors (24875864766).

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

21322169766 is a wasteful number, since it uses less digits than its factorization.

21322169766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184564995 (or 1184564992 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The spelling of 21322169766 in words is "twenty-one billion, three hundred twenty-two million, one hundred sixty-nine thousand, seven hundred sixty-six".