19921986033 has 8 divisors (see below), whose sum is σ = 26619529248. Its totient is φ = 13252883424.

The previous prime is 19921985953. The next prime is 19921986047. The reversal of 19921986033 is 33068912991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19921986033 - 2⁹ = 19921985521 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19921986083) 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 7 ways as a sum of consecutive naturals, for example, 7108516 + ... + 7111317.

It is an arithmetic number, because the mean of its divisors is an integer number (3327441156).

Almost surely, 2^19921986033 is an apocalyptic number.

It is an amenable number.

19921986033 is a deficient number, since it is larger than the sum of its proper divisors (6697543215).

19921986033 is a wasteful number, since it uses less digits than its factorization.

19921986033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14220303.

The product of its (nonzero) digits is 629856, while the sum is 51.

The spelling of 19921986033 in words is "nineteen billion, nine hundred twenty-one million, nine hundred eighty-six thousand, thirty-three".