19806734036 has 12 divisors (see below), whose sum is σ = 34674848628. Its totient is φ = 9899634432.

The previous prime is 19806734021. The next prime is 19806734071. The reversal of 19806734036 is 63043760891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9642061636 + 10164672400 = 98194^2 + 100820^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921191 + ... + 942446.

It is an arithmetic number, because the mean of its divisors is an integer number (2889570719).

Almost surely, 2^19806734036 is an apocalyptic number.

It is an amenable number.

19806734036 is a deficient number, since it is larger than the sum of its proper divisors (14868114592).

19806734036 is a wasteful number, since it uses less digits than its factorization.

19806734036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866298 (or 1866296 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 19806734036 in words is "nineteen billion, eight hundred six million, seven hundred thirty-four thousand, thirty-six".