18549113 has 8 divisors (see below), whose sum is σ = 20463840. Its totient is φ = 16672480.

The previous prime is 18549107. The next prime is 18549143. The reversal of 18549113 is 31194581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18549113 - 2¹⁸ = 18286969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18549113.

It is not an unprimeable number, because it can be changed into a prime (18549143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8495 + ... + 10452.

It is an arithmetic number, because the mean of its divisors is an integer number (2557980).

Almost surely, 2^18549113 is an apocalyptic number.

It is an amenable number.

18549113 is a deficient number, since it is larger than the sum of its proper divisors (1914727).

18549113 is a wasteful number, since it uses less digits than its factorization.

18549113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19047.

The product of its digits is 4320, while the sum is 32.

The square root of 18549113 is about 4306.8681196433. The cubic root of 18549113 is about 264.7124589690.

The spelling of 18549113 in words is "eighteen million, five hundred forty-nine thousand, one hundred thirteen".