18442368 has 96 divisors (see below), whose sum is σ = 60677760. Its totient is φ = 5266944.

The previous prime is 18442367. The next prime is 18442373. The reversal of 18442368 is 86324481.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18442367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6921 + ... + 9207.

It is an arithmetic number, because the mean of its divisors is an integer number (632060).

Almost surely, 2^18442368 is an apocalyptic number.

18442368 is a gapful number since it is divisible by the number (18) 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 18442368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30338880).

18442368 is an abundant number, since it is smaller than the sum of its proper divisors (42235392).

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

18442368 is a wasteful number, since it uses less digits than its factorization.

18442368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314 (or 2299 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 18442368 is about 4294.4578237538. The cubic root of 18442368 is about 264.2036995365.

It can be divided in two parts, 18 and 442368, that multiplied together give a 5-th power (7962624 = 24⁵).

The spelling of 18442368 in words is "eighteen million, four hundred forty-two thousand, three hundred sixty-eight".