18007389 has 12 divisors (see below), whose sum is σ = 26399776. Its totient is φ = 11825352.

The previous prime is 18007361. The next prime is 18007447. The reversal of 18007389 is 98370081.

It is not a de Polignac number, because 18007389 - 2⁵ = 18007357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18007489) 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, 14329 + ... + 15534.

Almost surely, 2^18007389 is an apocalyptic number.

It is an amenable number.

18007389 is a deficient number, since it is larger than the sum of its proper divisors (8392387).

18007389 is a wasteful number, since it uses less digits than its factorization.

18007389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29936 (or 29933 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18007389 is about 4243.5113997726. The cubic root of 18007389 is about 262.1099949932.

The spelling of 18007389 in words is "eighteen million, seven thousand, three hundred eighty-nine".