18412613 has 2 divisors, whose sum is σ = 18412614. Its totient is φ = 18412612.

The previous prime is 18412561. The next prime is 18412621. The reversal of 18412613 is 31621481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11950849 + 6461764 = 3457^2 + 2542^2 .

It is a cyclic number.

It is not a de Polignac number, because 18412613 - 2⁶ = 18412549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18412633) 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 as a sum of consecutive naturals, namely, 9206306 + 9206307.

It is an arithmetic number, because the mean of its divisors is an integer number (9206307).

Almost surely, 2^18412613 is an apocalyptic number.

It is an amenable number.

18412613 is a deficient number, since it is larger than the sum of its proper divisors (1).

18412613 is an equidigital number, since it uses as much as digits as its factorization.

18412613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 18412613 is about 4290.9920764317. The cubic root of 18412613 is about 264.0615339040.

The spelling of 18412613 in words is "eighteen million, four hundred twelve thousand, six hundred thirteen".