20307863 has 2 divisors, whose sum is σ = 20307864. Its totient is φ = 20307862.

The previous prime is 20307817. The next prime is 20307871. The reversal of 20307863 is 36870302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20307863 - 2²⁰ = 19259287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20367863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153931 + 10153932.

It is an arithmetic number, because the mean of its divisors is an integer number (10153932).

Almost surely, 2^20307863 is an apocalyptic number.

20307863 is a deficient number, since it is larger than the sum of its proper divisors (1).

20307863 is an equidigital number, since it uses as much as digits as its factorization.

20307863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20307863 is about 4506.4246360058. The cubic root of 20307863 is about 272.8274569747.

The spelling of 20307863 in words is "twenty million, three hundred seven thousand, eight hundred sixty-three".