21763806168 has 64 divisors (see below), whose sum is σ = 58609152000. Its totient is φ = 6694922880.

The previous prime is 21763806157. The next prime is 21763806173. The reversal of 21763806168 is 86160836712.

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, 2147433 + ... + 2157543.

It is an arithmetic number, because the mean of its divisors is an integer number (915768000).

Almost surely, 2^21763806168 is an apocalyptic number.

It is an amenable number.

21763806168 is an abundant number, since it is smaller than the sum of its proper divisors (36845345832).

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

21763806168 is a wasteful number, since it uses less digits than its factorization.

21763806168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17032 (or 17028 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 21763806168 in words is "twenty-one billion, seven hundred sixty-three million, eight hundred six thousand, one hundred sixty-eight".