18409368 has 32 divisors (see below), whose sum is σ = 48731760. Its totient is φ = 5775360.

The previous prime is 18409367. The next prime is 18409393. The reversal of 18409368 is 86390481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18409367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22153 + ... + 22968.

Almost surely, 2^18409368 is an apocalyptic number.

It is an amenable number.

18409368 is an abundant number, since it is smaller than the sum of its proper divisors (30322392).

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

18409368 is a wasteful number, since it uses less digits than its factorization.

18409368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45147 (or 45143 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18409368 is about 4290.6139420833. The cubic root of 18409368 is about 264.0460204437.

The spelling of 18409368 in words is "eighteen million, four hundred nine thousand, three hundred sixty-eight".