18948882847 has 2 divisors, whose sum is σ = 18948882848. Its totient is φ = 18948882846.

The previous prime is 18948882829. The next prime is 18948882859. The reversal of 18948882847 is 74828884981.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18948882847 is a prime.

It is a super-2 number, since 2×18948882847² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18948882817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474441423 + 9474441424.

It is an arithmetic number, because the mean of its divisors is an integer number (9474441424).

Almost surely, 2^18948882847 is an apocalyptic number.

18948882847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18948882847 is an equidigital number, since it uses as much as digits as its factorization.

18948882847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66060288, while the sum is 67.

The spelling of 18948882847 in words is "eighteen billion, nine hundred forty-eight million, eight hundred eighty-two thousand, eight hundred forty-seven".