19697188680 has 96 divisors (see below), whose sum is σ = 68940176760. Its totient is φ = 4848537600.

The previous prime is 19697188607. The next prime is 19697188723. The reversal of 19697188680 is 8688179691.

It can be written as a sum of positive squares in 4 ways, for example, as 16270022916 + 3427165764 = 127554^2 + 58542^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2099721 + ... + 2109080.

Almost surely, 2^19697188680 is an apocalyptic number.

19697188680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19697188680 is an abundant number, since it is smaller than the sum of its proper divisors (49242988080).

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

19697188680 is a wasteful number, since it uses less digits than its factorization.

19697188680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208831 (or 4208824 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The spelling of 19697188680 in words is "nineteen billion, six hundred ninety-seven million, one hundred eighty-eight thousand, six hundred eighty".