18923112 has 128 divisors (see below), whose sum is σ = 59270400. Its totient is φ = 5550336.

The previous prime is 18923039. The next prime is 18923123. The reversal of 18923112 is 21132981.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

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 31 ways as a sum of consecutive naturals, for example, 64438 + ... + 64730.

It is an arithmetic number, because the mean of its divisors is an integer number (463050).

Almost surely, 2^18923112 is an apocalyptic number.

18923112 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 18923112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29635200).

18923112 is an abundant number, since it is smaller than the sum of its proper divisors (40347288).

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

18923112 is a wasteful number, since it uses less digits than its factorization.

18923112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 334 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 18923112 is about 4350.0703442588. The cubic root of 18923112 is about 266.4797342694.

The spelling of 18923112 in words is "eighteen million, nine hundred twenty-three thousand, one hundred twelve".