19838764235 has 4 divisors (see below), whose sum is σ = 23806517088. Its totient is φ = 15871011384.

The previous prime is 19838764217. The next prime is 19838764237. The reversal of 19838764235 is 53246783891.

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

It is a cyclic number.

It is not a de Polignac number, because 19838764235 - 2³⁴ = 2658895051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19838764237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1983876419 + ... + 1983876428.

It is an arithmetic number, because the mean of its divisors is an integer number (5951629272).

Almost surely, 2^19838764235 is an apocalyptic number.

19838764235 is a deficient number, since it is larger than the sum of its proper divisors (3967752853).

19838764235 is an equidigital number, since it uses as much as digits as its factorization.

19838764235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967752852.

The product of its digits is 8709120, while the sum is 56.

The spelling of 19838764235 in words is "nineteen billion, eight hundred thirty-eight million, seven hundred sixty-four thousand, two hundred thirty-five".