18441499 has 2 divisors, whose sum is σ = 18441500. Its totient is φ = 18441498.

The previous prime is 18441491. The next prime is 18441517. The reversal of 18441499 is 99414481.

It is a weak prime.

It is an emirp because it is prime and its reverse (99414481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18441499 - 2³ = 18441491 is a prime.

It is not a weakly prime, because it can be changed into another prime (18441491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9220749 + 9220750.

It is an arithmetic number, because the mean of its divisors is an integer number (9220750).

Almost surely, 2^18441499 is an apocalyptic number.

18441499 is a deficient number, since it is larger than the sum of its proper divisors (1).

18441499 is an equidigital number, since it uses as much as digits as its factorization.

18441499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 18441499 is about 4294.3566456455. The cubic root of 18441499 is about 264.1995497328.

The spelling of 18441499 in words is "eighteen million, four hundred forty-one thousand, four hundred ninety-nine".