22638818553 has 64 divisors (see below), whose sum is σ = 35097753600. Its totient is φ = 12855029760.

The previous prime is 22638818513. The next prime is 22638818563. The reversal of 22638818553 is 35581883622.

It is not a de Polignac number, because 22638818553 - 2⁸ = 22638818297 is a prime.

It is a super-2 number, since 2×22638818553² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 22638818496 and 22638818505.

It is not an unprimeable number, because it can be changed into a prime (22638818513) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15731608 + ... + 15733046.

It is an arithmetic number, because the mean of its divisors is an integer number (548402400).

Almost surely, 2^22638818553 is an apocalyptic number.

It is an amenable number.

22638818553 is a deficient number, since it is larger than the sum of its proper divisors (12458935047).

22638818553 is a wasteful number, since it uses less digits than its factorization.

22638818553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922.

The product of its digits is 2764800, while the sum is 51.

The spelling of 22638818553 in words is "twenty-two billion, six hundred thirty-eight million, eight hundred eighteen thousand, five hundred fifty-three".