20533867 has 2 divisors, whose sum is σ = 20533868. Its totient is φ = 20533866.

The previous prime is 20533861. The next prime is 20533883. The reversal of 20533867 is 76833502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20533867 - 2³ = 20533859 is a prime.

It is not a weakly prime, because it can be changed into another prime (20533861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266933 + 10266934.

It is an arithmetic number, because the mean of its divisors is an integer number (10266934).

Almost surely, 2^20533867 is an apocalyptic number.

20533867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20533867 is an equidigital number, since it uses as much as digits as its factorization.

20533867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20533867 is about 4531.4310101777. The cubic root of 20533867 is about 273.8358145785.

The spelling of 20533867 in words is "twenty million, five hundred thirty-three thousand, eight hundred sixty-seven".