18442507147 has 2 divisors, whose sum is σ = 18442507148. Its totient is φ = 18442507146.

The previous prime is 18442507141. The next prime is 18442507169. The reversal of 18442507147 is 74170524481.

It is a weak prime.

It is an emirp because it is prime and its reverse (74170524481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18442507147 - 2¹¹ = 18442505099 is a prime.

It is not a weakly prime, because it can be changed into another prime (18442507141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9221253573 + 9221253574.

It is an arithmetic number, because the mean of its divisors is an integer number (9221253574).

Almost surely, 2^18442507147 is an apocalyptic number.

18442507147 is a deficient number, since it is larger than the sum of its proper divisors (1).

18442507147 is an equidigital number, since it uses as much as digits as its factorization.

18442507147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250880, while the sum is 43.

The spelling of 18442507147 in words is "eighteen billion, four hundred forty-two million, five hundred seven thousand, one hundred forty-seven".