18875983147 has 4 divisors (see below), whose sum is σ = 21572552176. Its totient is φ = 16179414120.

The previous prime is 18875983127. The next prime is 18875983241. The reversal of 18875983147 is 74138957881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74138957881 = 29 ⋅2556515789.

It is a cyclic number.

It is not a de Polignac number, because 18875983147 - 2¹⁹ = 18875458859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18875983127) 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, 1348284504 + ... + 1348284517.

It is an arithmetic number, because the mean of its divisors is an integer number (5393138044).

Almost surely, 2^18875983147 is an apocalyptic number.

18875983147 is a deficient number, since it is larger than the sum of its proper divisors (2696569029).

18875983147 is an equidigital number, since it uses as much as digits as its factorization.

18875983147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696569028.

The product of its digits is 13547520, while the sum is 61.

The spelling of 18875983147 in words is "eighteen billion, eight hundred seventy-five million, nine hundred eighty-three thousand, one hundred forty-seven".