18219792 has 20 divisors (see below), whose sum is σ = 47067920. Its totient is φ = 6073248.

The previous prime is 18219791. The next prime is 18219793. The reversal of 18219792 is 29791281.

It is an interprime number because it is at equal distance from previous prime (18219791) and next prime (18219793).

It is a self number, because there is not a number n which added to its sum of digits gives 18219792.

It is not an unprimeable number, because it can be changed into a prime (18219791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189742 + ... + 189837.

It is an arithmetic number, because the mean of its divisors is an integer number (2353396).

Almost surely, 2^18219792 is an apocalyptic number.

18219792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18219792 is an abundant number, since it is smaller than the sum of its proper divisors (28848128).

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

18219792 is a wasteful number, since it uses less digits than its factorization.

18219792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379590 (or 379584 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 18219792 is about 4268.4648294205. The cubic root of 18219792 is about 263.1365269163.

The spelling of 18219792 in words is "eighteen million, two hundred nineteen thousand, seven hundred ninety-two".