18550137 has 16 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 11674512.

The previous prime is 18550127. The next prime is 18550139. The reversal of 18550137 is 73105581.

It is not a de Polignac number, because 18550137 - 2¹⁶ = 18484601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18550139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28348 + ... + 28994.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^18550137 is an apocalyptic number.

It is an amenable number.

18550137 is a deficient number, since it is larger than the sum of its proper divisors (7577223).

18550137 is a wasteful number, since it uses less digits than its factorization.

18550137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 18550137 is about 4306.9869978908. The cubic root of 18550137 is about 264.7173300118.

The spelling of 18550137 in words is "eighteen million, five hundred fifty thousand, one hundred thirty-seven".