18312357 has 8 divisors (see below), whose sum is σ = 27904576. Its totient is φ = 10464192.

The previous prime is 18312353. The next prime is 18312397. The reversal of 18312357 is 75321381.

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

It is not a de Polignac number, because 18312357 - 2² = 18312353 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18312353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435988 + ... + 436029.

It is an arithmetic number, because the mean of its divisors is an integer number (3488072).

Almost surely, 2^18312357 is an apocalyptic number.

It is an amenable number.

18312357 is a deficient number, since it is larger than the sum of its proper divisors (9592219).

18312357 is an equidigital number, since it uses as much as digits as its factorization.

18312357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872027.

The product of its digits is 5040, while the sum is 30.

The square root of 18312357 is about 4279.2939838249. The cubic root of 18312357 is about 263.5813929528.

The spelling of 18312357 in words is "eighteen million, three hundred twelve thousand, three hundred fifty-seven".