18364489 has 16 divisors (see below), whose sum is σ = 21732480. Its totient is φ = 15298560.

The previous prime is 18364487. The next prime is 18364513. The reversal of 18364489 is 98446381.

It is a cyclic number.

It is not a de Polignac number, because 18364489 - 2¹ = 18364487 is a prime.

It is a super-2 number, since 2×18364489² = 674508912462242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18364481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23497 + ... + 24265.

It is an arithmetic number, because the mean of its divisors is an integer number (1358280).

Almost surely, 2^18364489 is an apocalyptic number.

It is an amenable number.

18364489 is a deficient number, since it is larger than the sum of its proper divisors (3367991).

18364489 is a wasteful number, since it uses less digits than its factorization.

18364489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

The product of its digits is 165888, while the sum is 43.

The square root of 18364489 is about 4285.3808465526. The cubic root of 18364489 is about 263.8312789788.

The spelling of 18364489 in words is "eighteen million, three hundred sixty-four thousand, four hundred eighty-nine".