18319413 has 8 divisors (see below), whose sum is σ = 27915328. Its totient is φ = 10468224.

The previous prime is 18319409. The next prime is 18319417. The reversal of 18319413 is 31491381.

It is an interprime number because it is at equal distance from previous prime (18319409) and next prime (18319417).

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

It is not a de Polignac number, because 18319413 - 2² = 18319409 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18319417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436156 + ... + 436197.

It is an arithmetic number, because the mean of its divisors is an integer number (3489416).

Almost surely, 2^18319413 is an apocalyptic number.

It is an amenable number.

18319413 is a deficient number, since it is larger than the sum of its proper divisors (9595915).

18319413 is an equidigital number, since it uses as much as digits as its factorization.

18319413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872363.

The product of its digits is 2592, while the sum is 30.

The square root of 18319413 is about 4280.1183394855. The cubic root of 18319413 is about 263.6152424365.

The spelling of 18319413 in words is "eighteen million, three hundred nineteen thousand, four hundred thirteen".