28018727851 has 2 divisors, whose sum is σ = 28018727852. Its totient is φ = 28018727850.

The previous prime is 28018727831. The next prime is 28018727897. The reversal of 28018727851 is 15872781082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28018727851 - 2⁵ = 28018727819 is a prime.

It is a super-2 number, since 2×28018727851² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28018727795 and 28018727804.

It is not a weakly prime, because it can be changed into another prime (28018727831) 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, 14009363925 + 14009363926.

It is an arithmetic number, because the mean of its divisors is an integer number (14009363926).

Almost surely, 2^28018727851 is an apocalyptic number.

28018727851 is a deficient number, since it is larger than the sum of its proper divisors (1).

28018727851 is an equidigital number, since it uses as much as digits as its factorization.

28018727851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501760, while the sum is 49.

The spelling of 28018727851 in words is "twenty-eight billion, eighteen million, seven hundred twenty-seven thousand, eight hundred fifty-one".