18898297 has 4 divisors (see below), whose sum is σ = 20616336. Its totient is φ = 17180260.

The previous prime is 18898291. The next prime is 18898307. The reversal of 18898297 is 79289881.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79289881 = 11 ⋅7208171.

It is a cyclic number.

It is not a de Polignac number, because 18898297 - 2³ = 18898289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18898291) 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, 859003 + ... + 859024.

It is an arithmetic number, because the mean of its divisors is an integer number (5154084).

Almost surely, 2^18898297 is an apocalyptic number.

It is an amenable number.

18898297 is a deficient number, since it is larger than the sum of its proper divisors (1718039).

18898297 is a wasteful number, since it uses less digits than its factorization.

18898297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718038.

The product of its digits is 580608, while the sum is 52.

The square root of 18898297 is about 4347.2171558366. The cubic root of 18898297 is about 266.3631997506.

The spelling of 18898297 in words is "eighteen million, eight hundred ninety-eight thousand, two hundred ninety-seven".