19850838663184 has 45 divisors (see below), whose sum is σ = 40857118286871. Its totient is φ = 9341428561920.

The previous prime is 19850838663181. The next prime is 19850838663197. The reversal of 19850838663184 is 48136683805891.

The square root of 19850838663184 is 4455428.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2604027690000 + 17246810973184 = 1613700^2 + 4152928^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19850838663181) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 302936344 + ... + 303001864.

Almost surely, 2^{19850838663184} is an apocalyptic number.

19850838663184 is the 4455428-th square number.

It is an amenable number.

19850838663184 is an abundant number, since it is smaller than the sum of its proper divisors (21006279623687).

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

19850838663184 is an frugal number, since it uses more digits than its factorization.

19850838663184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131084 (or 65540 counting only the distinct ones).

The product of its (nonzero) digits is 238878720, while the sum is 70.

The spelling of 19850838663184 in words is "nineteen trillion, eight hundred fifty billion, eight hundred thirty-eight million, six hundred sixty-three thousand, one hundred eighty-four".