19931109694 has 16 divisors (see below), whose sum is σ = 29998273536. Its totient is φ = 9931735800.

The previous prime is 19931109691. The next prime is 19931109703. The reversal of 19931109694 is 49690113991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19931109691) 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, 821599 + ... + 845509.

It is an arithmetic number, because the mean of its divisors is an integer number (1874892096).

Almost surely, 2^19931109694 is an apocalyptic number.

19931109694 is a deficient number, since it is larger than the sum of its proper divisors (10067163842).

19931109694 is a wasteful number, since it uses less digits than its factorization.

19931109694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25311.

The product of its (nonzero) digits is 472392, while the sum is 52.

The spelling of 19931109694 in words is "nineteen billion, nine hundred thirty-one million, one hundred nine thousand, six hundred ninety-four".