19881404933 has 16 divisors (see below), whose sum is σ = 22107810816. Its totient is φ = 17754923520.

The previous prime is 19881404909. The next prime is 19881404969. The reversal of 19881404933 is 33940418891.

It is a cyclic number.

It is not a de Polignac number, because 19881404933 - 2⁶ = 19881404869 is a prime.

It is a Smith number, since the sum of its digits (50) 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 not an unprimeable number, because it can be changed into a prime (19881404903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2356160 + ... + 2364582.

It is an arithmetic number, because the mean of its divisors is an integer number (1381738176).

Almost surely, 2^19881404933 is an apocalyptic number.

19881404933 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19881404933 is a deficient number, since it is larger than the sum of its proper divisors (2226405883).

19881404933 is a wasteful number, since it uses less digits than its factorization.

19881404933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14324.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 19881404933 in words is "nineteen billion, eight hundred eighty-one million, four hundred four thousand, nine hundred thirty-three".