19843980835 has 16 divisors (see below), whose sum is σ = 27218980800. Its totient is φ = 13605111936.

The previous prime is 19843980797. The next prime is 19843980899. The reversal of 19843980835 is 53808934891.

It is a cyclic number.

It is not a de Polignac number, because 19843980835 - 2¹⁹ = 19843456547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19843980835.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192561 + ... + 277069.

It is an arithmetic number, because the mean of its divisors is an integer number (1701186300).

Almost surely, 2^19843980835 is an apocalyptic number.

19843980835 is a deficient number, since it is larger than the sum of its proper divisors (7374999965).

19843980835 is an equidigital number, since it uses as much as digits as its factorization.

19843980835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91230.

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 19843980835 in words is "nineteen billion, eight hundred forty-three million, nine hundred eighty thousand, eight hundred thirty-five".