18384969 has 8 divisors (see below), whose sum is σ = 24537600. Its totient is φ = 12244496.

The previous prime is 18384941. The next prime is 18384979. The reversal of 18384969 is 96948381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18384969 - 2⁷ = 18384841 is a prime.

It is a super-2 number, since 2×18384969² = 676014170261922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18384979) 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, 1432 + ... + 6230.

It is an arithmetic number, because the mean of its divisors is an integer number (3067200).

Almost surely, 2^18384969 is an apocalyptic number.

It is an amenable number.

18384969 is a deficient number, since it is larger than the sum of its proper divisors (6152631).

18384969 is a wasteful number, since it uses less digits than its factorization.

18384969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6079.

The product of its digits is 373248, while the sum is 48.

The square root of 18384969 is about 4287.7696999722. The cubic root of 18384969 is about 263.9293170505.

The spelling of 18384969 in words is "eighteen million, three hundred eighty-four thousand, nine hundred sixty-nine".