19188920122 has 16 divisors (see below), whose sum is σ = 29501359272. Its totient is φ = 9355386880.

The previous prime is 19188920111. The next prime is 19188920167. The reversal of 19188920122 is 22102988191.

It can be written as a sum of positive squares in 4 ways, for example, as 18095361361 + 1093558761 = 134519^2 + 33069^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91578 + ... + 216250.

Almost surely, 2^19188920122 is an apocalyptic number.

19188920122 is a deficient number, since it is larger than the sum of its proper divisors (10312439150).

19188920122 is a wasteful number, since it uses less digits than its factorization.

19188920122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126593.

The product of its (nonzero) digits is 41472, while the sum is 43.

The spelling of 19188920122 in words is "nineteen billion, one hundred eighty-eight million, nine hundred twenty thousand, one hundred twenty-two".