21762232368 has 80 divisors (see below), whose sum is σ = 58988057856. Its totient is φ = 6900284160.

The previous prime is 21762232357. The next prime is 21762232409. The reversal of 21762232368 is 86323226712.

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, 145371 + ... + 254277.

Almost surely, 2^21762232368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21762232368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29494028928).

21762232368 is an abundant number, since it is smaller than the sum of its proper divisors (37225825488).

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

21762232368 is a wasteful number, since it uses less digits than its factorization.

21762232368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109122 (or 109116 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The spelling of 21762232368 in words is "twenty-one billion, seven hundred sixty-two million, two hundred thirty-two thousand, three hundred sixty-eight".