20550667 has 2 divisors, whose sum is σ = 20550668. Its totient is φ = 20550666.

The previous prime is 20550659. The next prime is 20550701. The reversal of 20550667 is 76605502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20550667 - 2³ = 20550659 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20550617) 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, 10275333 + 10275334.

It is an arithmetic number, because the mean of its divisors is an integer number (10275334).

Almost surely, 2^20550667 is an apocalyptic number.

20550667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20550667 is an equidigital number, since it uses as much as digits as its factorization.

20550667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 20550667 is about 4533.2843502256. The cubic root of 20550667 is about 273.9104747748.

The spelling of 20550667 in words is "twenty million, five hundred fifty thousand, six hundred sixty-seven".