18852961849 has 2 divisors, whose sum is σ = 18852961850. Its totient is φ = 18852961848.

The previous prime is 18852961847. The next prime is 18852961867. The reversal of 18852961849 is 94816925881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18851290000 + 1671849 = 137300^2 + 1293^2 .

It is an emirp because it is prime and its reverse (94816925881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18852961849 - 2¹ = 18852961847 is a prime.

Together with 18852961847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18852961843) 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, 9426480924 + 9426480925.

It is an arithmetic number, because the mean of its divisors is an integer number (9426480925).

Almost surely, 2^18852961849 is an apocalyptic number.

It is an amenable number.

18852961849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18852961849 is an equidigital number, since it uses as much as digits as its factorization.

18852961849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9953280, while the sum is 61.

The spelling of 18852961849 in words is "eighteen billion, eight hundred fifty-two million, nine hundred sixty-one thousand, eight hundred forty-nine".