18885873277 has 4 divisors (see below), whose sum is σ = 19287700416. Its totient is φ = 18484046140.

The previous prime is 18885873271. The next prime is 18885873287. The reversal of 18885873277 is 77237858881.

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: 77237858881 = 241 ⋅320489041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18885873277 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 (18885873271) 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, 200913499 + ... + 200913592.

It is an arithmetic number, because the mean of its divisors is an integer number (4821925104).

Almost surely, 2^18885873277 is an apocalyptic number.

It is an amenable number.

18885873277 is a deficient number, since it is larger than the sum of its proper divisors (401827139).

18885873277 is an equidigital number, since it uses as much as digits as its factorization.

18885873277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401827138.

The product of its digits is 42147840, while the sum is 64.

The spelling of 18885873277 in words is "eighteen billion, eight hundred eighty-five million, eight hundred seventy-three thousand, two hundred seventy-seven".