33820811 has 2 divisors, whose sum is σ = 33820812. Its totient is φ = 33820810.

The previous prime is 33820807. The next prime is 33820819. The reversal of 33820811 is 11802833.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33820811 - 2² = 33820807 is a prime.

It is a super-2 number, since 2×33820811² = 2287694513395442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33820819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16910405 + 16910406.

It is an arithmetic number, because the mean of its divisors is an integer number (16910406).

Almost surely, 2^33820811 is an apocalyptic number.

33820811 is a deficient number, since it is larger than the sum of its proper divisors (1).

33820811 is an equidigital number, since it uses as much as digits as its factorization.

33820811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 33820811 is about 5815.5662664955. The cubic root of 33820811 is about 323.3910569938.

The spelling of 33820811 in words is "thirty-three million, eight hundred twenty thousand, eight hundred eleven".