18112380 has 96 divisors (see below), whose sum is σ = 59609088. Its totient is φ = 4051200.

The previous prime is 18112349. The next prime is 18112387. The reversal of 18112380 is 8321181.

It is a self number, because there is not a number n which added to its sum of digits gives 18112380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18112387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7525 + ... + 9635.

It is an arithmetic number, because the mean of its divisors is an integer number (620928).

Almost surely, 2^18112380 is an apocalyptic number.

18112380 is a gapful number since it is divisible by the number (10) 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 18112380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29804544).

18112380 is an abundant number, since it is smaller than the sum of its proper divisors (41496708).

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

18112380 is a wasteful number, since it uses less digits than its factorization.

18112380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 18112380 is about 4255.8641895624. The cubic root of 18112380 is about 262.6184136958.

It can be divided in two parts, 181 and 12380, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 18112380 in words is "eighteen million, one hundred twelve thousand, three hundred eighty".