18895064971 has 2 divisors, whose sum is σ = 18895064972. Its totient is φ = 18895064970.

The previous prime is 18895064939. The next prime is 18895065019. The reversal of 18895064971 is 17946059881.

It is a weak prime.

It is an emirp because it is prime and its reverse (17946059881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18895064971 - 2⁵ = 18895064939 is a prime.

It is a super-2 number, since 2×18895064971² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18895004971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9447532485 + 9447532486.

It is an arithmetic number, because the mean of its divisors is an integer number (9447532486).

Almost surely, 2^18895064971 is an apocalyptic number.

18895064971 is a deficient number, since it is larger than the sum of its proper divisors (1).

18895064971 is an equidigital number, since it uses as much as digits as its factorization.

18895064971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 18895064971 in words is "eighteen billion, eight hundred ninety-five million, sixty-four thousand, nine hundred seventy-one".