18944121 has 32 divisors (see below), whose sum is σ = 30822400. Its totient is φ = 10108800.

The previous prime is 18944119. The next prime is 18944129. The reversal of 18944121 is 12144981.

18944121 = T₂₃₂₃ + T₂₃₂₄ + ... + T₂₃₂₉.

It is not a de Polignac number, because 18944121 - 2¹ = 18944119 is a prime.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 31221 + ... + 31821.

It is an arithmetic number, because the mean of its divisors is an integer number (963200).

Almost surely, 2^18944121 is an apocalyptic number.

It is an amenable number.

18944121 is a deficient number, since it is larger than the sum of its proper divisors (11878279).

18944121 is a wasteful number, since it uses less digits than its factorization.

18944121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its digits is 2304, while the sum is 30.

The square root of 18944121 is about 4352.4844629246. The cubic root of 18944121 is about 266.5783156964.

The spelling of 18944121 in words is "eighteen million, nine hundred forty-four thousand, one hundred twenty-one".