18238946 has 16 divisors (see below), whose sum is σ = 29933280. Its totient is φ = 8266080.

The previous prime is 18238937. The next prime is 18238981. The reversal of 18238946 is 64983281.

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, 7985 + ... + 10011.

It is an arithmetic number, because the mean of its divisors is an integer number (1870830).

Almost surely, 2^18238946 is an apocalyptic number.

18238946 is a deficient number, since it is larger than the sum of its proper divisors (11694334).

18238946 is a wasteful number, since it uses less digits than its factorization.

18238946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449.

The product of its digits is 82944, while the sum is 41.

The square root of 18238946 is about 4270.7079038492. The cubic root of 18238946 is about 263.2287041831.

The spelling of 18238946 in words is "eighteen million, two hundred thirty-eight thousand, nine hundred forty-six".