18613345 has 8 divisors (see below), whose sum is σ = 22394664. Its totient is φ = 14851584.

The previous prime is 18613339. The next prime is 18613373. The reversal of 18613345 is 54331681.

It can be written as a sum of positive squares in 4 ways, for example, as 627264 + 17986081 = 792^2 + 4241^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18613345 - 2¹¹ = 18611297 is a prime.

It is a super-2 number, since 2×18613345² = 692913224178050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2704 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (2799333).

Almost surely, 2^18613345 is an apocalyptic number.

It is an amenable number.

18613345 is a deficient number, since it is larger than the sum of its proper divisors (3781319).

18613345 is an equidigital number, since it uses as much as digits as its factorization.

18613345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9779.

The product of its digits is 8640, while the sum is 31.

The square root of 18613345 is about 4314.3186020506. The cubic root of 18613345 is about 265.0176563529.

It can be divided in two parts, 186 and 13345, that added together give a palindrome (13531).

The spelling of 18613345 in words is "eighteen million, six hundred thirteen thousand, three hundred forty-five".