18668474003 has 2 divisors, whose sum is σ = 18668474004. Its totient is φ = 18668474002.

The previous prime is 18668473981. The next prime is 18668474021. The reversal of 18668474003 is 30047486681.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (30047486681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18668474003 - 2¹² = 18668469907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18668474023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9334237001 + 9334237002.

It is an arithmetic number, because the mean of its divisors is an integer number (9334237002).

Almost surely, 2^18668474003 is an apocalyptic number.

18668474003 is a deficient number, since it is larger than the sum of its proper divisors (1).

18668474003 is an equidigital number, since it uses as much as digits as its factorization.

18668474003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 18668474003 in words is "eighteen billion, six hundred sixty-eight million, four hundred seventy-four thousand, three".