19806734039 has 8 divisors (see below), whose sum is σ = 20194244352. Its totient is φ = 19419734880.

The previous prime is 19806734021. The next prime is 19806734071. The reversal of 19806734039 is 93043760891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19806734039 - 2⁸ = 19806733783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19806733039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49064 + ... + 204989.

It is an arithmetic number, because the mean of its divisors is an integer number (2524280544).

Almost surely, 2^19806734039 is an apocalyptic number.

19806734039 is a deficient number, since it is larger than the sum of its proper divisors (387510313).

19806734039 is a wasteful number, since it uses less digits than its factorization.

19806734039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255577.

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 19806734039 in words is "nineteen billion, eight hundred six million, seven hundred thirty-four thousand, thirty-nine".