18722112 has 28 divisors (see below), whose sum is σ = 49536096. Its totient is φ = 6240640.

The previous prime is 18722107. The next prime is 18722113. The reversal of 18722112 is 21122781.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18722113) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 48564 + ... + 48947.

Almost surely, 2^18722112 is an apocalyptic number.

18722112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18722112 is an abundant number, since it is smaller than the sum of its proper divisors (30813984).

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

18722112 is an equidigital number, since it uses as much as digits as its factorization.

18722112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97526 (or 97516 counting only the distinct ones).

The product of its digits is 448, while the sum is 24.

The square root of 18722112 is about 4326.9055917595. The cubic root of 18722112 is about 265.5328639526.

Adding to 18722112 its reverse (21122781), we get a palindrome (39844893).

The spelling of 18722112 in words is "eighteen million, seven hundred twenty-two thousand, one hundred twelve".