18654613 has 2 divisors, whose sum is σ = 18654614. Its totient is φ = 18654612.

The previous prime is 18654589. The next prime is 18654641. The reversal of 18654613 is 31645681.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10227204 + 8427409 = 3198^2 + 2903^2 .

It is a cyclic number.

It is not a de Polignac number, because 18654613 - 2²¹ = 16557461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18654673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9327306 + 9327307.

It is an arithmetic number, because the mean of its divisors is an integer number (9327307).

Almost surely, 2^18654613 is an apocalyptic number.

It is an amenable number.

18654613 is a deficient number, since it is larger than the sum of its proper divisors (1).

18654613 is an equidigital number, since it uses as much as digits as its factorization.

18654613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 18654613 is about 4319.0986328168. The cubic root of 18654613 is about 265.2133703401.

The spelling of 18654613 in words is "eighteen million, six hundred fifty-four thousand, six hundred thirteen".