20188039922 has 6 divisors (see below), whose sum is σ = 30282361293. Its totient is φ = 10093919492.

The previous prime is 20188039909. The next prime is 20188039939. The reversal of 20188039922 is 22993088102.

It can be written as a sum of positive squares in 2 ways, for example, as 16070379361 + 4117660561 = 126769^2 + 64169^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=100469.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 150704 + ... + 251172.

Almost surely, 2^20188039922 is an apocalyptic number.

20188039922 is a deficient number, since it is larger than the sum of its proper divisors (10094321371).

20188039922 is an frugal number, since it uses more digits than its factorization.

20188039922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200940 (or 100471 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 20188039922 in words is "twenty billion, one hundred eighty-eight million, thirty-nine thousand, nine hundred twenty-two".