18361120 has 24 divisors (see below), whose sum is σ = 43378524. Its totient is φ = 7344384.

The previous prime is 18361117. The next prime is 18361127. The reversal of 18361120 is 2116381.

It can be written as a sum of positive squares in 2 ways, for example, as 18352656 + 8464 = 4284^2 + 92^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18361091 and 18361100.

It is not an unprimeable number, because it can be changed into a prime (18361127) 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, 57219 + ... + 57538.

Almost surely, 2^18361120 is an apocalyptic number.

18361120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18361120 is an abundant number, since it is smaller than the sum of its proper divisors (25017404).

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

18361120 is a wasteful number, since it uses less digits than its factorization.

18361120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114772 (or 114764 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 18361120 is about 4284.9877479405. The cubic root of 18361120 is about 263.8151445442.

It can be divided in two parts, 18361 and 120, that added together give a palindrome (18481).

The spelling of 18361120 in words is "eighteen million, three hundred sixty-one thousand, one hundred twenty".