18683897 has 4 divisors (see below), whose sum is σ = 19667280. Its totient is φ = 17700516.

The previous prime is 18683893. The next prime is 18683921. The reversal of 18683897 is 79838681.

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 18683897 - 2² = 18683893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18683893) 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, 491663 + ... + 491700.

It is an arithmetic number, because the mean of its divisors is an integer number (4916820).

Almost surely, 2^18683897 is an apocalyptic number.

It is an amenable number.

18683897 is a deficient number, since it is larger than the sum of its proper divisors (983383).

18683897 is an equidigital number, since it uses as much as digits as its factorization.

18683897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983382.

The product of its digits is 580608, while the sum is 50.

The square root of 18683897 is about 4322.4873626189. The cubic root of 18683897 is about 265.3520750477.

The spelling of 18683897 in words is "eighteen million, six hundred eighty-three thousand, eight hundred ninety-seven".