19694289792 has 64 divisors (see below), whose sum is σ = 55066291200. Its totient is φ = 6219247104.

The previous prime is 19694289757. The next prime is 19694289809. The reversal of 19694289792 is 29798249691.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×19694289792² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342368 + ... + 1356959.

It is an arithmetic number, because the mean of its divisors is an integer number (860410800).

Almost surely, 2^19694289792 is an apocalyptic number.

19694289792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19694289792 is an abundant number, since it is smaller than the sum of its proper divisors (35372001408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19694289792 is a wasteful number, since it uses less digits than its factorization.

19694289792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699363 (or 2699351 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 66.

The spelling of 19694289792 in words is "nineteen billion, six hundred ninety-four million, two hundred eighty-nine thousand, seven hundred ninety-two".