33868442521 has 4 divisors (see below), whose sum is σ = 33877305472. Its totient is φ = 33859579572.

The previous prime is 33868442459. The next prime is 33868442537. The reversal of 33868442521 is 12524486833.

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: 12524486833 = 71 ⋅176401223.

It is a cyclic number.

It is not a de Polignac number, because 33868442521 - 2¹⁹ = 33867918233 is a prime.

It is a super-2 number, since 2×33868442521² (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 (33868440521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4425741 + ... + 4433386.

It is an arithmetic number, because the mean of its divisors is an integer number (8469326368).

Almost surely, 2^33868442521 is an apocalyptic number.

It is an amenable number.

33868442521 is a deficient number, since it is larger than the sum of its proper divisors (8862951).

33868442521 is an equidigital number, since it uses as much as digits as its factorization.

33868442521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8862950.

The product of its digits is 1105920, while the sum is 46.

The spelling of 33868442521 in words is "thirty-three billion, eight hundred sixty-eight million, four hundred forty-two thousand, five hundred twenty-one".