20863313 has 2 divisors, whose sum is σ = 20863314. Its totient is φ = 20863312.

The previous prime is 20863309. The next prime is 20863321. The reversal of 20863313 is 31336802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14992384 + 5870929 = 3872^2 + 2423^2 .

It is a cyclic number.

It is not a de Polignac number, because 20863313 - 2² = 20863309 is a prime.

It is not a weakly prime, because it can be changed into another prime (20863373) 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, 10431656 + 10431657.

It is an arithmetic number, because the mean of its divisors is an integer number (10431657).

Almost surely, 2^20863313 is an apocalyptic number.

It is an amenable number.

20863313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20863313 is an equidigital number, since it uses as much as digits as its factorization.

20863313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20863313 is about 4567.6375731881. The cubic root of 20863313 is about 275.2925283851.

The spelling of 20863313 in words is "twenty million, eight hundred sixty-three thousand, three hundred thirteen".