33363821 has 2 divisors, whose sum is σ = 33363822. Its totient is φ = 33363820.

The previous prime is 33363817. The next prime is 33363859. The reversal of 33363821 is 12836333.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32649796 + 714025 = 5714^2 + 845^2 .

It is an emirp because it is prime and its reverse (12836333) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33363821 - 2² = 33363817 is a prime.

It is a super-2 number, since 2×33363821² = 2226289103440082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33363721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16681910 + 16681911.

It is an arithmetic number, because the mean of its divisors is an integer number (16681911).

Almost surely, 2^33363821 is an apocalyptic number.

It is an amenable number.

33363821 is a deficient number, since it is larger than the sum of its proper divisors (1).

33363821 is an equidigital number, since it uses as much as digits as its factorization.

33363821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

The square root of 33363821 is about 5776.1423978292. The cubic root of 33363821 is about 321.9278833648.

The spelling of 33363821 in words is "thirty-three million, three hundred sixty-three thousand, eight hundred twenty-one".