18496689 has 4 divisors (see below), whose sum is σ = 24662256. Its totient is φ = 12331124.

The previous prime is 18496649. The next prime is 18496691. The reversal of 18496689 is 98669481.

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.

It is a cyclic number.

It is not a de Polignac number, because 18496689 - 2¹³ = 18488497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18496619) 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, 3082779 + ... + 3082784.

It is an arithmetic number, because the mean of its divisors is an integer number (6165564).

Almost surely, 2^18496689 is an apocalyptic number.

It is an amenable number.

18496689 is a deficient number, since it is larger than the sum of its proper divisors (6165567).

18496689 is an equidigital number, since it uses as much as digits as its factorization.

18496689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165566.

The product of its digits is 746496, while the sum is 51.

The square root of 18496689 is about 4300.7777203664. Note that the first 4 decimals coincide. The cubic root of 18496689 is about 264.4628445181.

The spelling of 18496689 in words is "eighteen million, four hundred ninety-six thousand, six hundred eighty-nine".