19939706830 has 8 divisors (see below), whose sum is σ = 35891472312. Its totient is φ = 7975882728.

The previous prime is 19939706821. The next prime is 19939706849. The reversal of 19939706830 is 3860793991.

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

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, 996985332 + ... + 996985351.

It is an arithmetic number, because the mean of its divisors is an integer number (4486434039).

Almost surely, 2^19939706830 is an apocalyptic number.

19939706830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19939706830 is a deficient number, since it is larger than the sum of its proper divisors (15951765482).

19939706830 is a wasteful number, since it uses less digits than its factorization.

19939706830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993970690.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 19939706830 in words is "nineteen billion, nine hundred thirty-nine million, seven hundred six thousand, eight hundred thirty".