18413873 has 8 divisors (see below), whose sum is σ = 19745280. Its totient is φ = 17110080.

The previous prime is 18413851. The next prime is 18413893. The reversal of 18413873 is 37831481.

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

It is a cyclic number.

It is not a de Polignac number, because 18413873 - 2⁶ = 18413809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18413803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5513 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (2468160).

Almost surely, 2^18413873 is an apocalyptic number.

It is an amenable number.

18413873 is a deficient number, since it is larger than the sum of its proper divisors (1331407).

18413873 is a wasteful number, since it uses less digits than its factorization.

18413873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13807.

The product of its digits is 16128, while the sum is 35.

The square root of 18413873 is about 4291.1388931145. The cubic root of 18413873 is about 264.0675571292.

The spelling of 18413873 in words is "eighteen million, four hundred thirteen thousand, eight hundred seventy-three".