19931291373 has 32 divisors (see below), whose sum is σ = 31390154752. Its totient is φ = 11008224000.

The previous prime is 19931291339. The next prime is 19931291381. The reversal of 19931291373 is 37319213991.

It is a happy number.

It is not a de Polignac number, because 19931291373 - 2⁸ = 19931291117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19931291273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 517173 + ... + 554373.

It is an arithmetic number, because the mean of its divisors is an integer number (980942336).

Almost surely, 2^19931291373 is an apocalyptic number.

It is an amenable number.

19931291373 is a deficient number, since it is larger than the sum of its proper divisors (11458863379).

19931291373 is a wasteful number, since it uses less digits than its factorization.

19931291373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38065.

The product of its digits is 275562, while the sum is 48.

The spelling of 19931291373 in words is "nineteen billion, nine hundred thirty-one million, two hundred ninety-one thousand, three hundred seventy-three".