33681916 has 12 divisors (see below), whose sum is σ = 59037160. Its totient is φ = 16814160.

The previous prime is 33681911. The next prime is 33681917. The reversal of 33681916 is 61918633.

33681916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×33681916² = 2268942930862112, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33681911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3726 + ... + 9013.

Almost surely, 2^33681916 is an apocalyptic number.

It is an amenable number.

33681916 is a deficient number, since it is larger than the sum of its proper divisors (25355244).

33681916 is a wasteful number, since it uses less digits than its factorization.

33681916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13404 (or 13402 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 33681916 is about 5803.6123233724. The cubic root of 33681916 is about 322.9477497618.

The spelling of 33681916 in words is "thirty-three million, six hundred eighty-one thousand, nine hundred sixteen".