20750867 has 2 divisors, whose sum is σ = 20750868. Its totient is φ = 20750866.

The previous prime is 20750857. The next prime is 20750927. The reversal of 20750867 is 76805702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20750867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20750837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10375433 + 10375434.

It is an arithmetic number, because the mean of its divisors is an integer number (10375434).

Almost surely, 2^20750867 is an apocalyptic number.

20750867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20750867 is an equidigital number, since it uses as much as digits as its factorization.

20750867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 20750867 is about 4555.3119541915. The cubic root of 20750867 is about 274.7970601921.

The spelling of 20750867 in words is "twenty million, seven hundred fifty thousand, eight hundred sixty-seven".