18340992 has 160 divisors (see below), whose sum is σ = 57390300. Its totient is φ = 5806080.

The previous prime is 18340979. The next prime is 18341017. The reversal of 18340992 is 29904381.

It can be written as a sum of positive squares in 2 ways, for example, as 16842816 + 1498176 = 4104^2 + 1224^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 300642 + ... + 300702.

Almost surely, 2^18340992 is an apocalyptic number.

18340992 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 18340992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28695150).

18340992 is an abundant number, since it is smaller than the sum of its proper divisors (39049308).

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

18340992 is an equidigital number, since it uses as much as digits as its factorization.

18340992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 18340992 is about 4282.6384390934. The cubic root of 18340992 is about 263.7187086557.

The spelling of 18340992 in words is "eighteen million, three hundred forty thousand, nine hundred ninety-two".