18000922 has 4 divisors (see below), whose sum is σ = 27001386. Its totient is φ = 9000460.

The previous prime is 18000919. The next prime is 18000937. The reversal of 18000922 is 22900081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16313521 + 1687401 = 4039^2 + 1299^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18000893 and 18000902.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4500229 + ... + 4500232.

Almost surely, 2^18000922 is an apocalyptic number.

18000922 is a deficient number, since it is larger than the sum of its proper divisors (9000464).

18000922 is an equidigital number, since it uses as much as digits as its factorization.

18000922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000463.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 18000922 is about 4242.7493444699. The cubic root of 18000922 is about 262.0786140178.

The spelling of 18000922 in words is "eighteen million, nine hundred twenty-two", and thus it is an aban number.