18389164 has 6 divisors (see below), whose sum is σ = 32181044. Its totient is φ = 9194580.

The previous prime is 18389153. The next prime is 18389183. The reversal of 18389164 is 46198381.

It is a super-2 number, since 2×18389164² = 676322705237792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2298642 + ... + 2298649.

Almost surely, 2^18389164 is an apocalyptic number.

It is an amenable number.

18389164 is a deficient number, since it is larger than the sum of its proper divisors (13791880).

18389164 is a wasteful number, since it uses less digits than its factorization.

18389164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4597295 (or 4597293 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 18389164 is about 4288.2588541272. The cubic root of 18389164 is about 263.9493895943.

The spelling of 18389164 in words is "eighteen million, three hundred eighty-nine thousand, one hundred sixty-four".