18394992 has 240 divisors, whose sum is σ = 67852800. Its totient is φ = 4717440.

The previous prime is 18394967. The next prime is 18394993. The reversal of 18394992 is 29949381.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18394993) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232809 + ... + 232887.

It is an arithmetic number, because the mean of its divisors is an integer number (282720).

Almost surely, 2^18394992 is an apocalyptic number.

18394992 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 18394992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33926400).

18394992 is an abundant number, since it is smaller than the sum of its proper divisors (49457808).

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

18394992 is a wasteful number, since it uses less digits than its factorization.

18394992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 102 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 18394992 is about 4288.9383301698. The cubic root of 18394992 is about 263.9772707704.

It can be divided in two parts, 183949 and 92, that added together give a square (184041 = 429²).

The spelling of 18394992 in words is "eighteen million, three hundred ninety-four thousand, nine hundred ninety-two".