19385838772 has 12 divisors (see below), whose sum is σ = 33951383620. Its totient is φ = 9685443456.

The previous prime is 19385838749. The next prime is 19385838827. The reversal of 19385838772 is 27783858391.

It can be written as a sum of positive squares in 2 ways, for example, as 15693575076 + 3692263696 = 125274^2 + 60764^2 .

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 19385838772.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1863147 + ... + 1873522.

Almost surely, 2^19385838772 is an apocalyptic number.

It is an amenable number.

19385838772 is a deficient number, since it is larger than the sum of its proper divisors (14565544848).

19385838772 is a wasteful number, since it uses less digits than its factorization.

19385838772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737970 (or 3737968 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 61.

The spelling of 19385838772 in words is "nineteen billion, three hundred eighty-five million, eight hundred thirty-eight thousand, seven hundred seventy-two".