19973933239 has 4 divisors (see below), whose sum is σ = 21510389656. Its totient is φ = 18437476824.

The previous prime is 19973933209. The next prime is 19973933249. The reversal of 19973933239 is 93233937991.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19973933239 - 2¹⁹ = 19973408951 is a prime.

It is a super-2 number, since 2×19973933239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19973933209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768228189 + ... + 768228214.

It is an arithmetic number, because the mean of its divisors is an integer number (5377597414).

Almost surely, 2^19973933239 is an apocalyptic number.

19973933239 is a deficient number, since it is larger than the sum of its proper divisors (1536456417).

19973933239 is a wasteful number, since it uses less digits than its factorization.

19973933239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536456416.

The product of its digits is 7440174, while the sum is 58.

The spelling of 19973933239 in words is "nineteen billion, nine hundred seventy-three million, nine hundred thirty-three thousand, two hundred thirty-nine".