18160549 has 4 divisors (see below), whose sum is σ = 19811520. Its totient is φ = 16509580.

The previous prime is 18160537. The next prime is 18160553. The reversal of 18160549 is 94506181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18160549 - 2⁵ = 18160517 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 (18160579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825469 + ... + 825490.

It is an arithmetic number, because the mean of its divisors is an integer number (4952880).

Almost surely, 2^18160549 is an apocalyptic number.

It is an amenable number.

18160549 is a deficient number, since it is larger than the sum of its proper divisors (1650971).

18160549 is a wasteful number, since it uses less digits than its factorization.

18160549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650970.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18160549 is about 4261.5195646624. The cubic root of 18160549 is about 262.8510146171.

It can be divided in two parts, 18 and 160549, that multiplied together give a palindrome (2889882).

The spelling of 18160549 in words is "eighteen million, one hundred sixty thousand, five hundred forty-nine".