22501304640 has 84 divisors (see below), whose sum is σ = 77395122324. Its totient is φ = 6000347136.

The previous prime is 22501304627. The next prime is 22501304641. The reversal of 22501304640 is 4640310522.

22501304640 is a `hidden beast` number, since 2 + 2 + 5 + 0 + 13 + 0 + 4 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17114918976 + 5386385664 = 130824^2 + 73392^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22501304641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3903597 + ... + 3909356.

Almost surely, 2^22501304640 is an apocalyptic number.

22501304640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22501304640 is an abundant number, since it is smaller than the sum of its proper divisors (54893817684).

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

22501304640 is a wasteful number, since it uses less digits than its factorization.

22501304640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7812976 (or 7812963 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 22501304640 in words is "twenty-two billion, five hundred one million, three hundred four thousand, six hundred forty".