19694899447 has 8 divisors (see below), whose sum is σ = 20384735360. Its totient is φ = 19008470880.

The previous prime is 19694899429. The next prime is 19694899451. The reversal of 19694899447 is 74499849691.

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

It is not a de Polignac number, because 19694899447 - 2⁷ = 19694899319 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 (19694899547) 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, 840072 + ... + 863197.

It is an arithmetic number, because the mean of its divisors is an integer number (2548091920).

Almost surely, 2^19694899447 is an apocalyptic number.

19694899447 is a deficient number, since it is larger than the sum of its proper divisors (689835913).

19694899447 is a wasteful number, since it uses less digits than its factorization.

19694899447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703673.

The product of its digits is 141087744, while the sum is 70.

The spelling of 19694899447 in words is "nineteen billion, six hundred ninety-four million, eight hundred ninety-nine thousand, four hundred forty-seven".