18472343587 has 2 divisors, whose sum is σ = 18472343588. Its totient is φ = 18472343586.

The previous prime is 18472343537. The next prime is 18472343639. The reversal of 18472343587 is 78534327481.

It is an a-pointer prime, because the next prime (18472343639) can be obtained adding 18472343587 to its sum of digits (52).

It is a weak prime.

It is an emirp because it is prime and its reverse (78534327481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18472343587 - 2¹¹ = 18472341539 is a prime.

It is not a weakly prime, because it can be changed into another prime (18472343537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9236171793 + 9236171794.

It is an arithmetic number, because the mean of its divisors is an integer number (9236171794).

Almost surely, 2^18472343587 is an apocalyptic number.

18472343587 is a deficient number, since it is larger than the sum of its proper divisors (1).

18472343587 is an equidigital number, since it uses as much as digits as its factorization.

18472343587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 52.

The spelling of 18472343587 in words is "eighteen billion, four hundred seventy-two million, three hundred forty-three thousand, five hundred eighty-seven".