20366851 has 2 divisors, whose sum is σ = 20366852. Its totient is φ = 20366850.

The previous prime is 20366809. The next prime is 20366881. The reversal of 20366851 is 15866302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20366851 - 2¹¹ = 20364803 is a prime.

It is not a weakly prime, because it can be changed into another prime (20366881) 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, 10183425 + 10183426.

It is an arithmetic number, because the mean of its divisors is an integer number (10183426).

Almost surely, 2^20366851 is an apocalyptic number.

20366851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20366851 is an equidigital number, since it uses as much as digits as its factorization.

20366851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20366851 is about 4512.9647683092. The cubic root of 20366851 is about 273.0913611398.

The spelling of 20366851 in words is "twenty million, three hundred sixty-six thousand, eight hundred fifty-one".