19894233803 has 16 divisors (see below), whose sum is σ = 21173118720. Its totient is φ = 18639027936.

The previous prime is 19894233797. The next prime is 19894233851. The reversal of 19894233803 is 30833249891.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19894233803 - 2⁶ = 19894233739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19894233503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1533701 + ... + 1546617.

It is an arithmetic number, because the mean of its divisors is an integer number (1323319920).

Almost surely, 2^19894233803 is an apocalyptic number.

19894233803 is a deficient number, since it is larger than the sum of its proper divisors (1278884917).

19894233803 is a wasteful number, since it uses less digits than its factorization.

19894233803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13826.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 19894233803 in words is "nineteen billion, eight hundred ninety-four million, two hundred thirty-three thousand, eight hundred three".