18814603863446 has 4 divisors (see below), whose sum is σ = 28221905795172. Its totient is φ = 9407301931722.

The previous prime is 18814603863409. The next prime is 18814603863491. The reversal of 18814603863446 is 64436830641881.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4703650965860 + ... + 4703650965863.

It is an arithmetic number, because the mean of its divisors is an integer number (7055476448793).

Almost surely, 2^{18814603863446} is an apocalyptic number.

18814603863446 is a deficient number, since it is larger than the sum of its proper divisors (9407301931726).

18814603863446 is an equidigital number, since it uses as much as digits as its factorization.

18814603863446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9407301931725.

The product of its (nonzero) digits is 63700992, while the sum is 62.

The spelling of 18814603863446 in words is "eighteen trillion, eight hundred fourteen billion, six hundred three million, eight hundred sixty-three thousand, four hundred forty-six".