18468811523 has 2 divisors, whose sum is σ = 18468811524. Its totient is φ = 18468811522.

The previous prime is 18468811511. The next prime is 18468811541. The reversal of 18468811523 is 32511886481.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18468811523 is a prime.

It is not a weakly prime, because it can be changed into another prime (18468814523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234405761 + 9234405762.

It is an arithmetic number, because the mean of its divisors is an integer number (9234405762).

Almost surely, 2^18468811523 is an apocalyptic number.

18468811523 is a deficient number, since it is larger than the sum of its proper divisors (1).

18468811523 is an equidigital number, since it uses as much as digits as its factorization.

18468811523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 47.

The spelling of 18468811523 in words is "eighteen billion, four hundred sixty-eight million, eight hundred eleven thousand, five hundred twenty-three".