18745670663 has 2 divisors, whose sum is σ = 18745670664. Its totient is φ = 18745670662.

The previous prime is 18745670633. The next prime is 18745670717. The reversal of 18745670663 is 36607654781.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18745670663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18745670623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9372835331 + 9372835332.

It is an arithmetic number, because the mean of its divisors is an integer number (9372835332).

Almost surely, 2^18745670663 is an apocalyptic number.

18745670663 is a deficient number, since it is larger than the sum of its proper divisors (1).

18745670663 is an equidigital number, since it uses as much as digits as its factorization.

18745670663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 18745670663 in words is "eighteen billion, seven hundred forty-five million, six hundred seventy thousand, six hundred sixty-three".