18473793787 has 2 divisors, whose sum is σ = 18473793788. Its totient is φ = 18473793786.

The previous prime is 18473793781. The next prime is 18473793829. The reversal of 18473793787 is 78739737481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18473793787 - 2¹⁹ = 18473269499 is a prime.

It is not a weakly prime, because it can be changed into another prime (18473793781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9236896893 + 9236896894.

It is an arithmetic number, because the mean of its divisors is an integer number (9236896894).

Almost surely, 2^18473793787 is an apocalyptic number.

18473793787 is a deficient number, since it is larger than the sum of its proper divisors (1).

18473793787 is an equidigital number, since it uses as much as digits as its factorization.

18473793787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49787136, while the sum is 64.

The spelling of 18473793787 in words is "eighteen billion, four hundred seventy-three million, seven hundred ninety-three thousand, seven hundred eighty-seven".