21733256922 has 128 divisors (see below), whose sum is σ = 50048409600. Its totient is φ = 6240858624.

The previous prime is 21733256869. The next prime is 21733256953. The reversal of 21733256922 is 22965233712.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12612753 + ... + 12614475.

It is an arithmetic number, because the mean of its divisors is an integer number (391003200).

Almost surely, 2^21733256922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21733256922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25024204800).

21733256922 is an abundant number, since it is smaller than the sum of its proper divisors (28315152678).

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

21733256922 is a wasteful number, since it uses less digits than its factorization.

21733256922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its digits is 272160, while the sum is 42.

The spelling of 21733256922 in words is "twenty-one billion, seven hundred thirty-three million, two hundred fifty-six thousand, nine hundred twenty-two".