33904892081 has 4 divisors (see below), whose sum is σ = 33907294452. Its totient is φ = 33902489712.

The previous prime is 33904892069. The next prime is 33904892111. The reversal of 33904892081 is 18029840933.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18029840933 = 13 ⋅1386910841.

It can be written as a sum of positive squares in 2 ways, for example, as 32279512225 + 1625379856 = 179665^2 + 40316^2 .

It is a cyclic number.

It is not a de Polignac number, because 33904892081 - 2⁶ = 33904892017 is a prime.

It is a super-2 number, since 2×33904892081² (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 (33904892881) 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, 1179890 + ... + 1208283.

It is an arithmetic number, because the mean of its divisors is an integer number (8476823613).

Almost surely, 2^33904892081 is an apocalyptic number.

It is an amenable number.

33904892081 is a deficient number, since it is larger than the sum of its proper divisors (2402371).

33904892081 is a wasteful number, since it uses less digits than its factorization.

33904892081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402370.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 33904892081 in words is "thirty-three billion, nine hundred four million, eight hundred ninety-two thousand, eighty-one".