18013911547 has 2 divisors, whose sum is σ = 18013911548. Its totient is φ = 18013911546.

The previous prime is 18013911541. The next prime is 18013911593. The reversal of 18013911547 is 74511931081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18013911547 - 2¹¹ = 18013909499 is a prime.

It is not a weakly prime, because it can be changed into another prime (18013911541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006955773 + 9006955774.

It is an arithmetic number, because the mean of its divisors is an integer number (9006955774).

Almost surely, 2^18013911547 is an apocalyptic number.

18013911547 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013911547 is an equidigital number, since it uses as much as digits as its factorization.

18013911547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 18013911547 in words is "eighteen billion, thirteen million, nine hundred eleven thousand, five hundred forty-seven".