18113149 has 2 divisors, whose sum is σ = 18113150. Its totient is φ = 18113148.

The previous prime is 18113141. The next prime is 18113153. The reversal of 18113149 is 94131181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10725625 + 7387524 = 3275^2 + 2718^2 .

It is a cyclic number.

It is not a de Polignac number, because 18113149 - 2³ = 18113141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18113141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9056574 + 9056575.

It is an arithmetic number, because the mean of its divisors is an integer number (9056575).

Almost surely, 2^18113149 is an apocalyptic number.

It is an amenable number.

18113149 is a deficient number, since it is larger than the sum of its proper divisors (1).

18113149 is an equidigital number, since it uses as much as digits as its factorization.

18113149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 28.

The square root of 18113149 is about 4255.9545345316. The cubic root of 18113149 is about 262.6221303195.

The spelling of 18113149 in words is "eighteen million, one hundred thirteen thousand, one hundred forty-nine".