22000023018 has 12 divisors (see below), whose sum is σ = 47666716578. Its totient is φ = 7333341000.

The previous prime is 22000022987. The next prime is 22000023083. The reversal of 22000023018 is 81032000022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20469883329 + 1530139689 = 143073^2 + 39117^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1222223501 = 22000023018 / (2 + 2 + 0 + 0 + 0 + 0 + 2 + 3 + 0 + 1 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611111733 + ... + 611111768.

Almost surely, 2^22000023018 is an apocalyptic number.

22000023018 is an abundant number, since it is smaller than the sum of its proper divisors (25666693560).

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

22000023018 is a wasteful number, since it uses less digits than its factorization.

22000023018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222223509 (or 1222223506 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The spelling of 22000023018 in words is "twenty-two billion, twenty-three thousand, eighteen".