18159349 has 16 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 15628032.

The previous prime is 18159331. The next prime is 18159353. The reversal of 18159349 is 94395181.

It is not a de Polignac number, because 18159349 - 2⁷ = 18159221 is a prime.

It is a super-2 number, since 2×18159349² = 659523912207602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18159389) 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, 27744 + ... + 28390.

It is an arithmetic number, because the mean of its divisors is an integer number (1306368).

Almost surely, 2^18159349 is an apocalyptic number.

It is an amenable number.

18159349 is a deficient number, since it is larger than the sum of its proper divisors (2742539).

18159349 is a wasteful number, since it uses less digits than its factorization.

18159349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its digits is 38880, while the sum is 40.

The square root of 18159349 is about 4261.3787674883. The cubic root of 18159349 is about 262.8452249947.

The spelling of 18159349 in words is "eighteen million, one hundred fifty-nine thousand, three hundred forty-nine".