19694490831 has 12 divisors (see below), whose sum is σ = 29944840120. Its totient is φ = 12438625680.

The previous prime is 19694490821. The next prime is 19694490883. The reversal of 19694490831 is 13809449691.

It is a happy number.

19694490831 is a `hidden beast` number, since 19 + 69 + 4 + 490 + 83 + 1 = 666.

It is not a de Polignac number, because 19694490831 - 2⁵ = 19694490799 is a prime.

It is a super-2 number, since 2×19694490831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19694490821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57586060 + ... + 57586401.

Almost surely, 2^19694490831 is an apocalyptic number.

19694490831 is a deficient number, since it is larger than the sum of its proper divisors (10250349289).

19694490831 is a wasteful number, since it uses less digits than its factorization.

19694490831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115172486 (or 115172483 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 19694490831 in words is "nineteen billion, six hundred ninety-four million, four hundred ninety thousand, eight hundred thirty-one".