19698683904 has 351 divisors, whose sum is σ = 61882701933. Its totient is φ = 6036258816.

The previous prime is 19698683899. The next prime is 19698683971. The reversal of 19698683904 is 40938689691.

It is a happy number.

The square root of 19698683904 is 140352.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 15336345600 + 4362338304 = 123840^2 + 66048^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 458108907 + ... + 458108949.

Almost surely, 2^19698683904 is an apocalyptic number.

19698683904 is the 140352-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19698683904

19698683904 is an abundant number, since it is smaller than the sum of its proper divisors (42184018029).

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

19698683904 is an equidigital number, since it uses as much as digits as its factorization.

19698683904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 19698683904 in words is "nineteen billion, six hundred ninety-eight million, six hundred eighty-three thousand, nine hundred four".