19731091742 has 16 divisors (see below), whose sum is σ = 30891801600. Its totient is φ = 9434056632.

The previous prime is 19731091741. The next prime is 19731091753. The reversal of 19731091742 is 24719013791.

It is a junction number, because it is equal to n+sod(n) for n = 19731091693 and 19731091702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19731091741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119759 + ... + 231957.

It is an arithmetic number, because the mean of its divisors is an integer number (1930737600).

Almost surely, 2^19731091742 is an apocalyptic number.

19731091742 is a deficient number, since it is larger than the sum of its proper divisors (11160709858).

19731091742 is a wasteful number, since it uses less digits than its factorization.

19731091742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116047.

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 19731091742 in words is "nineteen billion, seven hundred thirty-one million, ninety-one thousand, seven hundred forty-two".