19129823901 has 24 divisors (see below), whose sum is σ = 27956892600. Its totient is φ = 12603902976.

The previous prime is 19129823891. The next prime is 19129823917. The reversal of 19129823901 is 10932892191.

It can be written as a sum of positive squares in 4 ways, for example, as 1837836900 + 17291987001 = 42870^2 + 131499^2 .

It is not a de Polignac number, because 19129823901 - 2⁶ = 19129823837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19129823701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327985 + ... + 381881.

It is an arithmetic number, because the mean of its divisors is an integer number (1164870525).

Almost surely, 2^19129823901 is an apocalyptic number.

It is an amenable number.

19129823901 is a deficient number, since it is larger than the sum of its proper divisors (8827068699).

19129823901 is a wasteful number, since it uses less digits than its factorization.

19129823901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54365 (or 54362 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The spelling of 19129823901 in words is "nineteen billion, one hundred twenty-nine million, eight hundred twenty-three thousand, nine hundred one".