22138225188 has 12 divisors (see below), whose sum is σ = 51655858800. Its totient is φ = 7379408392.

The previous prime is 22138225177. The next prime is 22138225211. The reversal of 22138225188 is 88152283122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×22138225188³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922426038 + ... + 922426061.

It is an arithmetic number, because the mean of its divisors is an integer number (4304654900).

Almost surely, 2^22138225188 is an apocalyptic number.

It is an amenable number.

22138225188 is an abundant number, since it is smaller than the sum of its proper divisors (29517633612).

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

22138225188 is a wasteful number, since it uses less digits than its factorization.

22138225188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844852106 (or 1844852104 counting only the distinct ones).

The product of its digits is 122880, while the sum is 42.

The spelling of 22138225188 in words is "twenty-two billion, one hundred thirty-eight million, two hundred twenty-five thousand, one hundred eighty-eight".