18453985 has 8 divisors (see below), whose sum is σ = 24158016. Its totient is φ = 13421040.

The previous prime is 18453979. The next prime is 18453991. The reversal of 18453985 is 58935481.

It is an interprime number because it is at equal distance from previous prime (18453979) and next prime (18453991).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18453985 - 2¹⁹ = 17929697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167709 + ... + 167818.

It is an arithmetic number, because the mean of its divisors is an integer number (3019752).

Almost surely, 2^18453985 is an apocalyptic number.

It is an amenable number.

18453985 is a deficient number, since it is larger than the sum of its proper divisors (5704031).

18453985 is a wasteful number, since it uses less digits than its factorization.

18453985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335543.

The product of its digits is 172800, while the sum is 43.

The square root of 18453985 is about 4295.8101680591. The cubic root of 18453985 is about 264.2591625905.

The spelling of 18453985 in words is "eighteen million, four hundred fifty-three thousand, nine hundred eighty-five".