18081792 has 120 divisors (see below), whose sum is σ = 54504450. Its totient is φ = 5971968.

The previous prime is 18081781. The next prime is 18081821. The reversal of 18081792 is 29718081.

It can be written as a sum of positive squares in only one way, i.e., 14017536 + 4064256 = 3744^2 + 2016^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 165834 + ... + 165942.

Almost surely, 2^18081792 is an apocalyptic number.

18081792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18081792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27252225).

18081792 is an abundant number, since it is smaller than the sum of its proper divisors (36422658).

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

18081792 is an equidigital number, since it uses as much as digits as its factorization.

18081792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18081792 is about 4252.2690413472. The cubic root of 18081792 is about 262.4704946429.

It can be divided in two parts, 1808 and 1792, that added together give a square (3600 = 60²).

The spelling of 18081792 in words is "eighteen million, eighty-one thousand, seven hundred ninety-two".