19834081979 has 16 divisors (see below), whose sum is σ = 20261767680. Its totient is φ = 19409700000.

The previous prime is 19834081963. The next prime is 19834081987. The reversal of 19834081979 is 97918043891.

It is a cyclic number.

It is not a de Polignac number, because 19834081979 - 2⁴ = 19834081963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19834081999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20425964 + ... + 20426934.

It is an arithmetic number, because the mean of its divisors is an integer number (1266360480).

Almost surely, 2^19834081979 is an apocalyptic number.

19834081979 is a deficient number, since it is larger than the sum of its proper divisors (427685701).

19834081979 is an equidigital number, since it uses as much as digits as its factorization.

19834081979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 19834081979 in words is "nineteen billion, eight hundred thirty-four million, eighty-one thousand, nine hundred seventy-nine".