22513653640 has 32 divisors (see below), whose sum is σ = 50731049880. Its totient is φ = 8992069632.

The previous prime is 22513653619. The next prime is 22513653667. The reversal of 22513653640 is 4635631522.

It can be written as a sum of positive squares in 4 ways, for example, as 19317108196 + 3196545444 = 138986^2 + 56538^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22513653640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391239 + ... + 445078.

Almost surely, 2^22513653640 is an apocalyptic number.

22513653640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22513653640 is an abundant number, since it is smaller than the sum of its proper divisors (28217396240).

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

22513653640 is a wasteful number, since it uses less digits than its factorization.

22513653640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837001 (or 836997 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 22513653640 in words is "twenty-two billion, five hundred thirteen million, six hundred fifty-three thousand, six hundred forty".