18013649471 has 2 divisors, whose sum is σ = 18013649472. Its totient is φ = 18013649470.

The previous prime is 18013649449. The next prime is 18013649551. The reversal of 18013649471 is 17494631081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18013649471 - 2²⁶ = 17946540607 is a prime.

It is a super-3 number, since 3×18013649471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18013649671) 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, 9006824735 + 9006824736.

It is an arithmetic number, because the mean of its divisors is an integer number (9006824736).

Almost surely, 2^18013649471 is an apocalyptic number.

18013649471 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013649471 is an equidigital number, since it uses as much as digits as its factorization.

18013649471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 18013649471 in words is "eighteen billion, thirteen million, six hundred forty-nine thousand, four hundred seventy-one".