18244999 has 2 divisors, whose sum is σ = 18245000. Its totient is φ = 18244998.

The previous prime is 18244991. The next prime is 18245009. The reversal of 18244999 is 99944281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18244999 - 2³ = 18244991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18244991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9122499 + 9122500.

It is an arithmetic number, because the mean of its divisors is an integer number (9122500).

Almost surely, 2^18244999 is an apocalyptic number.

18244999 is a deficient number, since it is larger than the sum of its proper divisors (1).

18244999 is an equidigital number, since it uses as much as digits as its factorization.

18244999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 18244999 is about 4271.4165097775. The cubic root of 18244999 is about 263.2578203962.

It can be divided in two parts, 182 and 44999, that multiplied together give a palindrome (8189818).

The spelling of 18244999 in words is "eighteen million, two hundred forty-four thousand, nine hundred ninety-nine".