19795129749 has 24 divisors (see below), whose sum is σ = 31318873560. Its totient is φ = 11992178688.

The previous prime is 19795129721. The next prime is 19795129751. The reversal of 19795129749 is 94792159791.

It is a happy number.

19795129749 is a `hidden beast` number, since 1 + 9 + 79 + 512 + 9 + 7 + 49 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4732476849 + 15062652900 = 68793^2 + 122730^2 .

It is not a de Polignac number, because 19795129749 - 2⁷ = 19795129621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19795129049) 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, 2226252 + ... + 2235125.

It is an arithmetic number, because the mean of its divisors is an integer number (1304953065).

Almost surely, 2^19795129749 is an apocalyptic number.

It is an amenable number.

19795129749 is a deficient number, since it is larger than the sum of its proper divisors (11523743811).

19795129749 is a wasteful number, since it uses less digits than its factorization.

19795129749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461429 (or 4461426 counting only the distinct ones).

The product of its digits is 12859560, while the sum is 63.

The spelling of 19795129749 in words is "nineteen billion, seven hundred ninety-five million, one hundred twenty-nine thousand, seven hundred forty-nine".