19642232913 has 4 divisors (see below), whose sum is σ = 26189643888. Its totient is φ = 13094821940.

The previous prime is 19642232899. The next prime is 19642232917. The reversal of 19642232913 is 31923224691.

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: 31923224691 = 3 ⋅10641074897.

It is a cyclic number.

It is not a de Polignac number, because 19642232913 - 2²⁴ = 19625455697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19642232917) 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, 3273705483 + ... + 3273705488.

It is an arithmetic number, because the mean of its divisors is an integer number (6547410972).

Almost surely, 2^19642232913 is an apocalyptic number.

It is an amenable number.

19642232913 is a deficient number, since it is larger than the sum of its proper divisors (6547410975).

19642232913 is an equidigital number, since it uses as much as digits as its factorization.

19642232913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547410974.

The product of its digits is 139968, while the sum is 42.

It can be divided in two parts, 1964223 and 2913, that added together give a triangular number (1967136 = T₁₉₈₃).

The spelling of 19642232913 in words is "nineteen billion, six hundred forty-two million, two hundred thirty-two thousand, nine hundred thirteen".