33205343021 has 4 divisors (see below), whose sum is σ = 33220584000. Its totient is φ = 33190102044.

The previous prime is 33205342987. The next prime is 33205343029. The reversal of 33205343021 is 12034350233.

It is a happy number.

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: 12034350233 = 37 ⋅325252709.

It is a cyclic number.

It is not a de Polignac number, because 33205343021 - 2³⁴ = 16025473837 is a prime.

It is a super-2 number, since 2×33205343021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33205343029) 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, 7617221 + ... + 7621578.

It is an arithmetic number, because the mean of its divisors is an integer number (8305146000).

Almost surely, 2^33205343021 is an apocalyptic number.

It is an amenable number.

33205343021 is a deficient number, since it is larger than the sum of its proper divisors (15240979).

33205343021 is a wasteful number, since it uses less digits than its factorization.

33205343021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15240978.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 33205343021 its reverse (12034350233), we get a palindrome (45239693254).

The spelling of 33205343021 in words is "thirty-three billion, two hundred five million, three hundred forty-three thousand, twenty-one".