18056149 has 2 divisors, whose sum is σ = 18056150. Its totient is φ = 18056148.

The previous prime is 18056147. The next prime is 18056179. The reversal of 18056149 is 94165081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10355524 + 7700625 = 3218^2 + 2775^2 .

It is a cyclic number.

It is not a de Polignac number, because 18056149 - 2¹ = 18056147 is a prime.

Together with 18056147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18056147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9028074 + 9028075.

It is an arithmetic number, because the mean of its divisors is an integer number (9028075).

Almost surely, 2^18056149 is an apocalyptic number.

It is an amenable number.

18056149 is a deficient number, since it is larger than the sum of its proper divisors (1).

18056149 is an equidigital number, since it uses as much as digits as its factorization.

18056149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18056149 is about 4249.2527578387. The cubic root of 18056149 is about 262.3463602821.

The spelling of 18056149 in words is "eighteen million, fifty-six thousand, one hundred forty-nine".