20139519189 has 4 divisors (see below), whose sum is σ = 26852692256. Its totient is φ = 13426346124.

The previous prime is 20139519163. The next prime is 20139519209. The reversal of 20139519189 is 98191593102.

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 not a de Polignac number, because 20139519189 - 2²⁴ = 20122741973 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 (20139519089) 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, 3356586529 + ... + 3356586534.

It is an arithmetic number, because the mean of its divisors is an integer number (6713173064).

Almost surely, 2^20139519189 is an apocalyptic number.

It is an amenable number.

20139519189 is a deficient number, since it is larger than the sum of its proper divisors (6713173067).

20139519189 is an equidigital number, since it uses as much as digits as its factorization.

20139519189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713173066.

The product of its (nonzero) digits is 174960, while the sum is 48.

The spelling of 20139519189 in words is "twenty billion, one hundred thirty-nine million, five hundred nineteen thousand, one hundred eighty-nine".