18372049 has 2 divisors, whose sum is σ = 18372050. Its totient is φ = 18372048.

The previous prime is 18371999. The next prime is 18372071. The reversal of 18372049 is 94027381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18122049 + 250000 = 4257^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 18372049 - 2¹³ = 18363857 is a prime.

It is not a weakly prime, because it can be changed into another prime (18370049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9186024 + 9186025.

It is an arithmetic number, because the mean of its divisors is an integer number (9186025).

Almost surely, 2^18372049 is an apocalyptic number.

It is an amenable number.

18372049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18372049 is an equidigital number, since it uses as much as digits as its factorization.

18372049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 18372049 is about 4286.2628244194. The cubic root of 18372049 is about 263.8674772967.

The spelling of 18372049 in words is "eighteen million, three hundred seventy-two thousand, forty-nine".