19697409712 has 20 divisors (see below), whose sum is σ = 38201141776. Its totient is φ = 9839050560.

The previous prime is 19697409709. The next prime is 19697409727. The reversal of 19697409712 is 21790479691.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586548 + ... + 619219.

Almost surely, 2^19697409712 is an apocalyptic number.

It is an amenable number.

19697409712 is a deficient number, since it is larger than the sum of its proper divisors (18503732064).

19697409712 is a wasteful number, since it uses less digits than its factorization.

19697409712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206796 (or 1206790 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 55.

The spelling of 19697409712 in words is "nineteen billion, six hundred ninety-seven million, four hundred nine thousand, seven hundred twelve".