19431122038 has 4 divisors (see below), whose sum is σ = 29146683060. Its totient is φ = 9715561018.

The previous prime is 19431122033. The next prime is 19431122041. The reversal of 19431122038 is 83022113491.

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: 83022113491 = 79 ⋅1050912829.

It is a junction number, because it is equal to n+sod(n) for n = 19431121994 and 19431122012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19431122033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4857780508 + ... + 4857780511.

It is an arithmetic number, because the mean of its divisors is an integer number (7286670765).

Almost surely, 2^19431122038 is an apocalyptic number.

19431122038 is a deficient number, since it is larger than the sum of its proper divisors (9715561022).

19431122038 is an equidigital number, since it uses as much as digits as its factorization.

19431122038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9715561021.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 19431122038 in words is "nineteen billion, four hundred thirty-one million, one hundred twenty-two thousand, thirty-eight".