19691712000 has 480 divisors, whose sum is σ = 75135307104. Its totient is φ = 4939776000.

The previous prime is 19691711989. The next prime is 19691712067. The reversal of 19691712000 is 21719691.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9790995 + ... + 9793005.

Almost surely, 2^19691712000 is an apocalyptic number.

19691712000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19691712000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37567653552).

19691712000 is an abundant number, since it is smaller than the sum of its proper divisors (55443595104).

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

19691712000 is a wasteful number, since it uses less digits than its factorization.

19691712000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The spelling of 19691712000 in words is "nineteen billion, six hundred ninety-one million, seven hundred twelve thousand".