18489007 has 4 divisors (see below), whose sum is σ = 18802440. Its totient is φ = 18175576.

The previous prime is 18488993. The next prime is 18489017. The reversal of 18489007 is 70098481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18489007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18489017) 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, 156628 + ... + 156745.

It is an arithmetic number, because the mean of its divisors is an integer number (4700610).

Almost surely, 2^18489007 is an apocalyptic number.

18489007 is a deficient number, since it is larger than the sum of its proper divisors (313433).

18489007 is an equidigital number, since it uses as much as digits as its factorization.

18489007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313432.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 18489007 is about 4299.8845333334. The cubic root of 18489007 is about 264.4262274261.

The spelling of 18489007 in words is "eighteen million, four hundred eighty-nine thousand, seven".