22504321818 has 96 divisors (see below), whose sum is σ = 55962833472. Its totient is φ = 6473260800.

The previous prime is 22504321793. The next prime is 22504321837. The reversal of 22504321818 is 81812340522.

It is a happy number.

22504321818 is a `hidden beast` number, since 2 + 250 + 4 + 321 + 81 + 8 = 666.

It is a super-2 number, since 2×22504321818² (a number of 22 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 262905 + ... + 337827.

It is an arithmetic number, because the mean of its divisors is an integer number (582946182).

Almost surely, 2^22504321818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22504321818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27981416736).

22504321818 is an abundant number, since it is smaller than the sum of its proper divisors (33458511654).

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

22504321818 is a wasteful number, since it uses less digits than its factorization.

22504321818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75020 (or 75017 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 22504321818 in words is "twenty-two billion, five hundred four million, three hundred twenty-one thousand, eight hundred eighteen".