18875197 has 4 divisors (see below), whose sum is σ = 20591136. Its totient is φ = 17159260.

The previous prime is 18875191. The next prime is 18875231. The reversal of 18875197 is 79157881.

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 18875197 - 2¹⁹ = 18350909 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 (18875191) 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, 857953 + ... + 857974.

It is an arithmetic number, because the mean of its divisors is an integer number (5147784).

Almost surely, 2^18875197 is an apocalyptic number.

It is an amenable number.

18875197 is a deficient number, since it is larger than the sum of its proper divisors (1715939).

18875197 is a wasteful number, since it uses less digits than its factorization.

18875197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715938.

The product of its digits is 141120, while the sum is 46.

The square root of 18875197 is about 4344.5594713388. The cubic root of 18875197 is about 266.2546273818.

The spelling of 18875197 in words is "eighteen million, eight hundred seventy-five thousand, one hundred ninety-seven".