Search a number
-
+
20858543077 is a prime number
BaseRepresentation
bin10011011011010001…
…000001101111100101
31222211200000202221111
4103123101001233211
5320204241334302
613325434545021
71335615455641
oct233321015745
958750022844
1020858543077
118934116159
124061598171
131c755175a8
14101c32dc21
158213090d7
hex4db441be5

20858543077 has 2 divisors, whose sum is σ = 20858543078. Its totient is φ = 20858543076.

The previous prime is 20858543063. The next prime is 20858543143. The reversal of 20858543077 is 77034585802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20551802881 + 306740196 = 143359^2 + 17514^2 .

It is a cyclic number.

It is not a de Polignac number, because 20858543077 - 27 = 20858542949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20858543077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20858543047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10429271538 + 10429271539.

It is an arithmetic number, because the mean of its divisors is an integer number (10429271539).

Almost surely, 220858543077 is an apocalyptic number.

It is an amenable number.

20858543077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858543077 is an equidigital number, since it uses as much as digits as its factorization.

20858543077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 20858543077 in words is "twenty billion, eight hundred fifty-eight million, five hundred forty-three thousand, seventy-seven".