33091889873 has 4 divisors (see below), whose sum is σ = 37819302720. Its totient is φ = 28364477028.

The previous prime is 33091889863. The next prime is 33091889899. The reversal of 33091889873 is 37898819033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37898819033 = 20963 ⋅1807891.

It is a cyclic number.

It is not a de Polignac number, because 33091889873 - 2⁸ = 33091889617 is a prime.

It is a super-2 number, since 2×33091889873² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33091889863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2363706413 + ... + 2363706426.

It is an arithmetic number, because the mean of its divisors is an integer number (9454825680).

Almost surely, 2^33091889873 is an apocalyptic number.

It is an amenable number.

33091889873 is a deficient number, since it is larger than the sum of its proper divisors (4727412847).

33091889873 is an equidigital number, since it uses as much as digits as its factorization.

33091889873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727412846.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 33091889873 in words is "thirty-three billion, ninety-one million, eight hundred eighty-nine thousand, eight hundred seventy-three".