19859010084 has 45 divisors (see below), whose sum is σ = 51922007137. Its totient is φ = 6618824496.

The previous prime is 19859010047. The next prime is 19859010091. The reversal of 19859010084 is 48001095891.

The square root of 19859010084 is 140922.

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., 2593050084 + 17265960000 = 50922^2 + 131400^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2532682 + ... + 2540510.

Almost surely, 2^19859010084 is an apocalyptic number.

19859010084 is the 140922-nd square number.

It is an amenable number.

19859010084 is an abundant number, since it is smaller than the sum of its proper divisors (32062997053).

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

19859010084 is an frugal number, since it uses more digits than its factorization.

19859010084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15674 (or 7834 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 19859010084 in words is "nineteen billion, eight hundred fifty-nine million, ten thousand, eighty-four".