18547491463 has 2 divisors, whose sum is σ = 18547491464. Its totient is φ = 18547491462.

The previous prime is 18547491451. The next prime is 18547491493. The reversal of 18547491463 is 36419474581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18547491463 - 2³³ = 9957556871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18547491463.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18547491493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9273745731 + 9273745732.

It is an arithmetic number, because the mean of its divisors is an integer number (9273745732).

Almost surely, 2^18547491463 is an apocalyptic number.

18547491463 is a deficient number, since it is larger than the sum of its proper divisors (1).

18547491463 is an equidigital number, since it uses as much as digits as its factorization.

18547491463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 52.

The spelling of 18547491463 in words is "eighteen billion, five hundred forty-seven million, four hundred ninety-one thousand, four hundred sixty-three".