18490613 has 4 divisors (see below), whose sum is σ = 18519840. Its totient is φ = 18461388.

The previous prime is 18490607. The next prime is 18490627. The reversal of 18490613 is 31609481.

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 a cyclic number.

It is not a de Polignac number, because 18490613 - 2²² = 14296309 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 18490613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18490673) 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, 13643 + ... + 14936.

It is an arithmetic number, because the mean of its divisors is an integer number (4629960).

Almost surely, 2^18490613 is an apocalyptic number.

It is an amenable number.

18490613 is a deficient number, since it is larger than the sum of its proper divisors (29227).

18490613 is an equidigital number, since it uses as much as digits as its factorization.

18490613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29226.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18490613 is about 4300.0712784790. The cubic root of 18490613 is about 264.4338834390.

The spelling of 18490613 in words is "eighteen million, four hundred ninety thousand, six hundred thirteen".