18450149 has 2 divisors, whose sum is σ = 18450150. Its totient is φ = 18450148.

The previous prime is 18450143. The next prime is 18450167. The reversal of 18450149 is 94105481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 8305924 = 3185^2 + 2882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18450149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18450143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9225074 + 9225075.

It is an arithmetic number, because the mean of its divisors is an integer number (9225075).

Almost surely, 2^18450149 is an apocalyptic number.

It is an amenable number.

18450149 is a deficient number, since it is larger than the sum of its proper divisors (1).

18450149 is an equidigital number, since it uses as much as digits as its factorization.

18450149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18450149 is about 4295.3636633002. The cubic root of 18450149 is about 264.2408509468.

The spelling of 18450149 in words is "eighteen million, four hundred fifty thousand, one hundred forty-nine".