18122897 has 8 divisors (see below), whose sum is σ = 19809216. Its totient is φ = 16478352.

The previous prime is 18122891. The next prime is 18122899. The reversal of 18122897 is 79822181.

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 18122897 - 2⁸ = 18122641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18122897.

It is not an unprimeable number, because it can be changed into a prime (18122891) 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, 9533 + ... + 11274.

It is an arithmetic number, because the mean of its divisors is an integer number (2476152).

Almost surely, 2^18122897 is an apocalyptic number.

It is an amenable number.

18122897 is a deficient number, since it is larger than the sum of its proper divisors (1686319).

18122897 is a wasteful number, since it uses less digits than its factorization.

18122897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20887.

The product of its digits is 16128, while the sum is 38.

The square root of 18122897 is about 4257.0995994926. The cubic root of 18122897 is about 262.6692338797.

The spelling of 18122897 in words is "eighteen million, one hundred twenty-two thousand, eight hundred ninety-seven".