33506681939 has 4 divisors (see below), whose sum is σ = 33965677656. Its totient is φ = 33047686224.

The previous prime is 33506681909. The next prime is 33506681953. The reversal of 33506681939 is 93918660533.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33506681939 is a prime.

It is a super-2 number, since 2×33506681939² (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 (33506681909) 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, 229497749 + ... + 229497894.

It is an arithmetic number, because the mean of its divisors is an integer number (8491419414).

Almost surely, 2^33506681939 is an apocalyptic number.

33506681939 is a deficient number, since it is larger than the sum of its proper divisors (458995717).

33506681939 is an equidigital number, since it uses as much as digits as its factorization.

33506681939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458995716.

The product of its (nonzero) digits is 3149280, while the sum is 53.

The spelling of 33506681939 in words is "thirty-three billion, five hundred six million, six hundred eighty-one thousand, nine hundred thirty-nine".