18944123 has 16 divisors (see below), whose sum is σ = 21386112. Its totient is φ = 16770600.

The previous prime is 18944119. The next prime is 18944129. The reversal of 18944123 is 32144981.

It is a happy number.

It is not a de Polignac number, because 18944123 - 2² = 18944119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18944123.

It is not an unprimeable number, because it can be changed into a prime (18944129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57068 + ... + 57398.

It is an arithmetic number, because the mean of its divisors is an integer number (1336632).

Almost surely, 2^18944123 is an apocalyptic number.

18944123 is a deficient number, since it is larger than the sum of its proper divisors (2441989).

18944123 is an equidigital number, since it uses as much as digits as its factorization.

18944123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 385 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 18944123 is about 4352.4846926784. The cubic root of 18944123 is about 266.5783250776.

The spelling of 18944123 in words is "eighteen million, nine hundred forty-four thousand, one hundred twenty-three".