18368946 has 24 divisors (see below), whose sum is σ = 40876524. Its totient is φ = 5957280.

The previous prime is 18368939. The next prime is 18368947. The reversal of 18368946 is 64986381.

It can be written as a sum of positive squares in 2 ways, for example, as 12680721 + 5688225 = 3561^2 + 2385^2 .

It is not an unprimeable number, because it can be changed into a prime (18368947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13125 + ... + 14456.

Almost surely, 2^18368946 is an apocalyptic number.

18368946 is an abundant number, since it is smaller than the sum of its proper divisors (22507578).

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

18368946 is a wasteful number, since it uses less digits than its factorization.

18368946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27626 (or 27623 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 18368946 is about 4285.9008387969. The cubic root of 18368946 is about 263.8526209084.

The spelling of 18368946 in words is "eighteen million, three hundred sixty-eight thousand, nine hundred forty-six".