21896123922 has 12 divisors (see below), whose sum is σ = 47441601870. Its totient is φ = 7298707968.

The previous prime is 21896123917. The next prime is 21896123929. The reversal of 21896123922 is 22932169812.

21896123922 is a `hidden beast` number, since 2 + 1 + 8 + 9 + 612 + 3 + 9 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20286589761 + 1609534161 = 142431^2 + 40119^2 .

It is not an unprimeable number, because it can be changed into a prime (21896123929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 608225647 + ... + 608225682.

Almost surely, 2^21896123922 is an apocalyptic number.

21896123922 is an abundant number, since it is smaller than the sum of its proper divisors (25545477948).

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

21896123922 is a wasteful number, since it uses less digits than its factorization.

21896123922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216451337 (or 1216451334 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The spelling of 21896123922 in words is "twenty-one billion, eight hundred ninety-six million, one hundred twenty-three thousand, nine hundred twenty-two".