18722031139 has 16 divisors (see below), whose sum is σ = 21927558400. Its totient is φ = 15650379360.

The previous prime is 18722031131. The next prime is 18722031169. The reversal of 18722031139 is 93113022781.

It is not a de Polignac number, because 18722031139 - 2³ = 18722031131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18722031098 and 18722031107.

It is not an unprimeable number, because it can be changed into a prime (18722031131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151912 + ... + 246010.

It is an arithmetic number, because the mean of its divisors is an integer number (1370472400).

Almost surely, 2^18722031139 is an apocalyptic number.

18722031139 is a deficient number, since it is larger than the sum of its proper divisors (3205527261).

18722031139 is an equidigital number, since it uses as much as digits as its factorization.

18722031139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94810.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 18722031139 in words is "eighteen billion, seven hundred twenty-two million, thirty-one thousand, one hundred thirty-nine".