18683197 has 8 divisors (see below), whose sum is σ = 20179544. Its totient is φ = 17195328.

The previous prime is 18683191. The next prime is 18683201. The reversal of 18683197 is 79138681.

It can be written as a sum of positive squares in 4 ways, for example, as 5331481 + 13351716 = 2309^2 + 3654^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18683197 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 (18683191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2923 + ... + 6775.

It is an arithmetic number, because the mean of its divisors is an integer number (2522443).

Almost surely, 2^18683197 is an apocalyptic number.

It is an amenable number.

18683197 is a deficient number, since it is larger than the sum of its proper divisors (1496347).

18683197 is a wasteful number, since it uses less digits than its factorization.

18683197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239.

The product of its digits is 72576, while the sum is 43.

The square root of 18683197 is about 4322.4063899638. The cubic root of 18683197 is about 265.3487611642.

The spelling of 18683197 in words is "eighteen million, six hundred eighty-three thousand, one hundred ninety-seven".