18121160 has 16 divisors (see below), whose sum is σ = 40772700. Its totient is φ = 7248448.

The previous prime is 18121153. The next prime is 18121163. The reversal of 18121160 is 6112181.

It can be written as a sum of positive squares in 2 ways, for example, as 16467364 + 1653796 = 4058^2 + 1286^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (18121163) 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, 226475 + ... + 226554.

Almost surely, 2^18121160 is an apocalyptic number.

18121160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18121160 is an abundant number, since it is smaller than the sum of its proper divisors (22651540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18121160 is a wasteful number, since it uses less digits than its factorization.

18121160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453040 (or 453036 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 18121160 is about 4256.8955824638. The cubic root of 18121160 is about 262.6608417145.

It can be divided in two parts, 18121 and 160, that added together give a palindrome (18281).

The spelling of 18121160 in words is "eighteen million, one hundred twenty-one thousand, one hundred sixty".