18244931 has 2 divisors, whose sum is σ = 18244932. Its totient is φ = 18244930.

The previous prime is 18244909. The next prime is 18244951. The reversal of 18244931 is 13944281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18244931 is a prime.

It is a super-2 number, since 2×18244931² = 665755014389522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18244951) 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 as a sum of consecutive naturals, namely, 9122465 + 9122466.

It is an arithmetic number, because the mean of its divisors is an integer number (9122466).

Almost surely, 2^18244931 is an apocalyptic number.

18244931 is a deficient number, since it is larger than the sum of its proper divisors (1).

18244931 is an equidigital number, since it uses as much as digits as its factorization.

18244931 is an odious number, because the sum of its binary digits is odd.

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

The square root of 18244931 is about 4271.4085498814. The cubic root of 18244931 is about 263.2574933376.

The spelling of 18244931 in words is "eighteen million, two hundred forty-four thousand, nine hundred thirty-one".