20258863 has 2 divisors, whose sum is σ = 20258864. Its totient is φ = 20258862.

The previous prime is 20258831. The next prime is 20258867. The reversal of 20258863 is 36885202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20258863 - 2⁵ = 20258831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20258867) 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, 10129431 + 10129432.

It is an arithmetic number, because the mean of its divisors is an integer number (10129432).

Almost surely, 2^20258863 is an apocalyptic number.

20258863 is a deficient number, since it is larger than the sum of its proper divisors (1).

20258863 is an equidigital number, since it uses as much as digits as its factorization.

20258863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 20258863 is about 4500.9846700472. The cubic root of 20258863 is about 272.6078489020.

The spelling of 20258863 in words is "twenty million, two hundred fifty-eight thousand, eight hundred sixty-three".