33868282421 has 4 divisors (see below), whose sum is σ = 33902253612. Its totient is φ = 33834311232.

The previous prime is 33868282397. The next prime is 33868282463. The reversal of 33868282421 is 12428286833.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12428286833 = 307 ⋅40483019.

It can be written as a sum of positive squares in 2 ways, for example, as 25691601796 + 8176680625 = 160286^2 + 90425^2 .

It is a cyclic number.

It is not a de Polignac number, because 33868282421 - 2¹⁰ = 33868281397 is a prime.

It is a super-2 number, since 2×33868282421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33868282121) 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, 16984100 + ... + 16986093.

It is an arithmetic number, because the mean of its divisors is an integer number (8475563403).

Almost surely, 2^33868282421 is an apocalyptic number.

It is an amenable number.

33868282421 is a deficient number, since it is larger than the sum of its proper divisors (33971191).

33868282421 is an equidigital number, since it uses as much as digits as its factorization.

33868282421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33971190.

The product of its digits is 884736, while the sum is 47.

The spelling of 33868282421 in words is "thirty-three billion, eight hundred sixty-eight million, two hundred eighty-two thousand, four hundred twenty-one".