18384953 has 8 divisors (see below), whose sum is σ = 19247616. Its totient is φ = 17539200.

The previous prime is 18384941. The next prime is 18384979. The reversal of 18384953 is 35948381.

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 18384953 - 2⁸ = 18384697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18384953.

It is not an unprimeable number, because it can be changed into a prime (18384983) 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, 1976 + ... + 6377.

It is an arithmetic number, because the mean of its divisors is an integer number (2405952).

Almost surely, 2^18384953 is an apocalyptic number.

It is an amenable number.

18384953 is a deficient number, since it is larger than the sum of its proper divisors (862663).

18384953 is an equidigital number, since it uses as much as digits as its factorization.

18384953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8455.

The product of its digits is 103680, while the sum is 41.

The square root of 18384953 is about 4287.7678342000. The cubic root of 18384953 is about 263.9292404867.

The spelling of 18384953 in words is "eighteen million, three hundred eighty-four thousand, nine hundred fifty-three".