18912210122 has 16 divisors (see below), whose sum is σ = 30568317192. Its totient is φ = 8723619840.

The previous prime is 18912210067. The next prime is 18912210143. The reversal of 18912210122 is 22101221981.

It can be written as a sum of positive squares in 4 ways, for example, as 18103433401 + 808776721 = 134549^2 + 28439^2 .

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, 166583 + ... + 256074.

Almost surely, 2^18912210122 is an apocalyptic number.

18912210122 is a deficient number, since it is larger than the sum of its proper divisors (11656107070).

18912210122 is a wasteful number, since it uses less digits than its factorization.

18912210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424393.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 18912210122 in words is "eighteen billion, nine hundred twelve million, two hundred ten thousand, one hundred twenty-two".