18413149 has 2 divisors, whose sum is σ = 18413150. Its totient is φ = 18413148.

The previous prime is 18413137. The next prime is 18413177. The reversal of 18413149 is 94131481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10517049 + 7896100 = 3243^2 + 2810^2 .

It is an emirp because it is prime and its reverse (94131481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18413149 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18413149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18413189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9206574 + 9206575.

It is an arithmetic number, because the mean of its divisors is an integer number (9206575).

Almost surely, 2^18413149 is an apocalyptic number.

It is an amenable number.

18413149 is a deficient number, since it is larger than the sum of its proper divisors (1).

18413149 is an equidigital number, since it uses as much as digits as its factorization.

18413149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 18413149 is about 4291.0545323964. The cubic root of 18413149 is about 264.0640961985.

The spelling of 18413149 in words is "eighteen million, four hundred thirteen thousand, one hundred forty-nine".