18450489 has 4 divisors (see below), whose sum is σ = 24600656. Its totient is φ = 12300324.

The previous prime is 18450479. The next prime is 18450541. The reversal of 18450489 is 98405481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18450489 - 2⁸ = 18450233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18450469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3075079 + ... + 3075084.

It is an arithmetic number, because the mean of its divisors is an integer number (6150164).

Almost surely, 2^18450489 is an apocalyptic number.

It is an amenable number.

18450489 is a deficient number, since it is larger than the sum of its proper divisors (6150167).

18450489 is an equidigital number, since it uses as much as digits as its factorization.

18450489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6150166.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 18450489 is about 4295.4032406748. The cubic root of 18450489 is about 264.2424740834.

The spelling of 18450489 in words is "eighteen million, four hundred fifty thousand, four hundred eighty-nine".