19839694694 has 8 divisors (see below), whose sum is σ = 29763623448. Its totient is φ = 9918486880.

The previous prime is 19839694691. The next prime is 19839694697. The reversal of 19839694694 is 49649693891.

It is an interprime number because it is at equal distance from previous prime (19839694691) and next prime (19839694697).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19839694694² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19839694691) 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 3 ways as a sum of consecutive naturals, for example, 661907 + ... + 691230.

It is an arithmetic number, because the mean of its divisors is an integer number (3720452931).

Almost surely, 2^19839694694 is an apocalyptic number.

19839694694 is a deficient number, since it is larger than the sum of its proper divisors (9923928754).

19839694694 is a wasteful number, since it uses less digits than its factorization.

19839694694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360470.

The product of its digits is 90699264, while the sum is 68.

The spelling of 19839694694 in words is "nineteen billion, eight hundred thirty-nine million, six hundred ninety-four thousand, six hundred ninety-four".