20186852377 has 2 divisors, whose sum is σ = 20186852378. Its totient is φ = 20186852376.

The previous prime is 20186852341. The next prime is 20186852381. The reversal of 20186852377 is 77325868102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12169619856 + 8017232521 = 110316^2 + 89539^2 .

It is a cyclic number.

It is not a de Polignac number, because 20186852377 - 2²⁷ = 20052634649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20186852377.

It is not a weakly prime, because it can be changed into another prime (20186852327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10093426188 + 10093426189.

It is an arithmetic number, because the mean of its divisors is an integer number (10093426189).

Almost surely, 2^20186852377 is an apocalyptic number.

It is an amenable number.

20186852377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20186852377 is an equidigital number, since it uses as much as digits as its factorization.

20186852377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 20186852377 in words is "twenty billion, one hundred eighty-six million, eight hundred fifty-two thousand, three hundred seventy-seven".