18362149 has 4 divisors (see below), whose sum is σ = 19774636. Its totient is φ = 16949664.

The previous prime is 18362143. The next prime is 18362153. The reversal of 18362149 is 94126381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1404225 + 16957924 = 1185^2 + 4118^2 .

It is a cyclic number.

It is not a de Polignac number, because 18362149 - 2¹³ = 18353957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18362143) 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 in 3 ways as a sum of consecutive naturals, for example, 706224 + ... + 706249.

It is an arithmetic number, because the mean of its divisors is an integer number (4943659).

Almost surely, 2^18362149 is an apocalyptic number.

It is an amenable number.

18362149 is a deficient number, since it is larger than the sum of its proper divisors (1412487).

18362149 is a wasteful number, since it uses less digits than its factorization.

18362149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412486.

The product of its digits is 10368, while the sum is 34.

The square root of 18362149 is about 4285.1078166133. The cubic root of 18362149 is about 263.8200727242.

The spelling of 18362149 in words is "eighteen million, three hundred sixty-two thousand, one hundred forty-nine".