19642105929 has 4 divisors (see below), whose sum is σ = 26189474576. Its totient is φ = 13094737284.

The previous prime is 19642105921. The next prime is 19642105939. The reversal of 19642105929 is 92950124691.

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 19642105929 - 2³ = 19642105921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19642105921) 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, 3273684319 + ... + 3273684324.

It is an arithmetic number, because the mean of its divisors is an integer number (6547368644).

Almost surely, 2^19642105929 is an apocalyptic number.

It is an amenable number.

19642105929 is a deficient number, since it is larger than the sum of its proper divisors (6547368647).

19642105929 is an equidigital number, since it uses as much as digits as its factorization.

19642105929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6547368646.

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 19642105929 in words is "nineteen billion, six hundred forty-two million, one hundred five thousand, nine hundred twenty-nine".