18053149 has 2 divisors, whose sum is σ = 18053150. Its totient is φ = 18053148.

The previous prime is 18053143. The next prime is 18053209. The reversal of 18053149 is 94135081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18020025 + 33124 = 4245^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 18053149 - 2³ = 18053141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18053149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18053141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9026574 + 9026575.

It is an arithmetic number, because the mean of its divisors is an integer number (9026575).

Almost surely, 2^18053149 is an apocalyptic number.

It is an amenable number.

18053149 is a deficient number, since it is larger than the sum of its proper divisors (1).

18053149 is an equidigital number, since it uses as much as digits as its factorization.

18053149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18053149 is about 4248.8997399327. The cubic root of 18053149 is about 262.3318300026.

The spelling of 18053149 in words is "eighteen million, fifty-three thousand, one hundred forty-nine".