18860489 has 4 divisors (see below), whose sum is σ = 19261824. Its totient is φ = 18459156.

The previous prime is 18860477. The next prime is 18860503. The reversal of 18860489 is 98406881.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98406881 = 449 ⋅219169.

It is a de Polignac number, because none of the positive numbers 2^k-18860489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18860449) 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, 200597 + ... + 200690.

It is an arithmetic number, because the mean of its divisors is an integer number (4815456).

Almost surely, 2^18860489 is an apocalyptic number.

It is an amenable number.

18860489 is a deficient number, since it is larger than the sum of its proper divisors (401335).

18860489 is an equidigital number, since it uses as much as digits as its factorization.

18860489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401334.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18860489 is about 4342.8664497081. The cubic root of 18860489 is about 266.1854521097.

The spelling of 18860489 in words is "eighteen million, eight hundred sixty thousand, four hundred eighty-nine".