20858618113 has 2 divisors, whose sum is σ = 20858618114. Its totient is φ = 20858618112.

The previous prime is 20858618111. The next prime is 20858618161. The reversal of 20858618113 is 31181685802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19227427569 + 1631190544 = 138663^2 + 40388^2 .

It is a cyclic number.

It is not a de Polignac number, because 20858618113 - 2¹ = 20858618111 is a prime.

Together with 20858618111, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20858618113.

It is not a weakly prime, because it can be changed into another prime (20858618111) 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, 10429309056 + 10429309057.

It is an arithmetic number, because the mean of its divisors is an integer number (10429309057).

Almost surely, 2^20858618113 is an apocalyptic number.

It is an amenable number.

20858618113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858618113 is an equidigital number, since it uses as much as digits as its factorization.

20858618113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 20858618113 in words is "twenty billion, eight hundred fifty-eight million, six hundred eighteen thousand, one hundred thirteen".