19394735129 has 24 divisors (see below), whose sum is σ = 24625110816. Its totient is φ = 15104880000.

The previous prime is 19394735099. The next prime is 19394735137. The reversal of 19394735129 is 92153749391.

It is not a de Polignac number, because 19394735129 - 2⁸ = 19394734873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19394735429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1156454 + ... + 1173104.

It is an arithmetic number, because the mean of its divisors is an integer number (1026046284).

Almost surely, 2^19394735129 is an apocalyptic number.

It is an amenable number.

19394735129 is a deficient number, since it is larger than the sum of its proper divisors (5230375687).

19394735129 is a wasteful number, since it uses less digits than its factorization.

19394735129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18837 (or 18830 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 53.

The spelling of 19394735129 in words is "nineteen billion, three hundred ninety-four million, seven hundred thirty-five thousand, one hundred twenty-nine".