21761516676 has 24 divisors (see below), whose sum is σ = 50834795200. Its totient is φ = 7245564192.

The previous prime is 21761516657. The next prime is 21761516681. The reversal of 21761516676 is 67661516712.

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, 1023376 + ... + 1044423.

Almost surely, 2^21761516676 is an apocalyptic number.

It is an amenable number.

21761516676 is an abundant number, since it is smaller than the sum of its proper divisors (29073278524).

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

21761516676 is a wasteful number, since it uses less digits than its factorization.

21761516676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068683 (or 2068681 counting only the distinct ones).

The product of its digits is 635040, while the sum is 48.

The spelling of 21761516676 in words is "twenty-one billion, seven hundred sixty-one million, five hundred sixteen thousand, six hundred seventy-six".