18359013 has 4 divisors (see below), whose sum is σ = 24478688. Its totient is φ = 12239340.

The previous prime is 18358973. The next prime is 18359023. The reversal of 18359013 is 31095381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18359013 - 2⁸ = 18358757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18359023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3059833 + ... + 3059838.

It is an arithmetic number, because the mean of its divisors is an integer number (6119672).

Almost surely, 2^18359013 is an apocalyptic number.

It is an amenable number.

18359013 is a deficient number, since it is larger than the sum of its proper divisors (6119675).

18359013 is an equidigital number, since it uses as much as digits as its factorization.

18359013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6119674.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 18359013 is about 4284.7418825409. The cubic root of 18359013 is about 263.8050529344.

The spelling of 18359013 in words is "eighteen million, three hundred fifty-nine thousand, thirteen".