19696981900 has 18 divisors (see below), whose sum is σ = 42742450940. Its totient is φ = 7878792720.

The previous prime is 19696981897. The next prime is 19696981907. The reversal of 19696981900 is 918969691.

It is a super-2 number, since 2×19696981900² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19696981907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98484810 + ... + 98485009.

Almost surely, 2^19696981900 is an apocalyptic number.

19696981900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19696981900 is an abundant number, since it is smaller than the sum of its proper divisors (23045469040).

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

19696981900 is a wasteful number, since it uses less digits than its factorization.

19696981900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196969833 (or 196969826 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 58.

The spelling of 19696981900 in words is "nineteen billion, six hundred ninety-six million, nine hundred eighty-one thousand, nine hundred".