19305820894 has 4 divisors (see below), whose sum is σ = 28958731344. Its totient is φ = 9652910446.

The previous prime is 19305820883. The next prime is 19305820901. The reversal of 19305820894 is 49802850391.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4826455222 + ... + 4826455225.

It is an arithmetic number, because the mean of its divisors is an integer number (7239682836).

Almost surely, 2^19305820894 is an apocalyptic number.

19305820894 is a deficient number, since it is larger than the sum of its proper divisors (9652910450).

19305820894 is an equidigital number, since it uses as much as digits as its factorization.

19305820894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652910449.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 19305820894 in words is "nineteen billion, three hundred five million, eight hundred twenty thousand, eight hundred ninety-four".