20858543063 has 2 divisors, whose sum is σ = 20858543064. Its totient is φ = 20858543062.

The previous prime is 20858543047. The next prime is 20858543077. The reversal of 20858543063 is 36034585802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20858543063 - 2⁴ = 20858543047 is a prime.

It is a super-2 number, since 2×20858543063² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20858543033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10429271531 + 10429271532.

It is an arithmetic number, because the mean of its divisors is an integer number (10429271532).

Almost surely, 2^20858543063 is an apocalyptic number.

20858543063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858543063 is an equidigital number, since it uses as much as digits as its factorization.

20858543063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 20858543063 in words is "twenty billion, eight hundred fifty-eight million, five hundred forty-three thousand, sixty-three".