18942336 has 224 divisors, whose sum is σ = 66891600. Its totient is φ = 5225472.

The previous prime is 18942311. The next prime is 18942337. The reversal of 18942336 is 63324981.

It is a tau number, because it is divible by the number of its divisors (224).

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 and also a Zuckerman number because it is divisible by the product of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18942336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18942337) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 653170 + ... + 653198.

Almost surely, 2^18942336 is an apocalyptic number.

18942336 is a gapful number since it is divisible by the number (16) 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 18942336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33445800).

18942336 is an abundant number, since it is smaller than the sum of its proper divisors (47949264).

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

18942336 is an frugal number, since it uses more digits than its factorization.

18942336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 41 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 18942336 is about 4352.2794027957. The cubic root of 18942336 is about 266.5699426988.

The spelling of 18942336 in words is "eighteen million, nine hundred forty-two thousand, three hundred thirty-six".