19420712131 has 4 divisors (see below), whose sum is σ = 19427165064. Its totient is φ = 19414259200.

The previous prime is 19420712123. The next prime is 19420712177. The reversal of 19420712131 is 13121702491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13121702491 = 114547 ⋅114553.

It is a cyclic number.

It is not a de Polignac number, because 19420712131 - 2³ = 19420712123 is a prime.

It is a super-2 number, since 2×19420712131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19420712093 and 19420712102.

It is not an unprimeable number, because it can be changed into a prime (19420718131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3221950 + ... + 3227971.

It is an arithmetic number, because the mean of its divisors is an integer number (4856791266).

Almost surely, 2^19420712131 is an apocalyptic number.

19420712131 is a deficient number, since it is larger than the sum of its proper divisors (6452933).

19420712131 is an equidigital number, since it uses as much as digits as its factorization.

19420712131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6452932.

The product of its (nonzero) digits is 3024, while the sum is 31.

The spelling of 19420712131 in words is "nineteen billion, four hundred twenty million, seven hundred twelve thousand, one hundred thirty-one".