18864501730078 has 4 divisors (see below), whose sum is σ = 28296752595120. Its totient is φ = 9432250865038.

The previous prime is 18864501730073. The next prime is 18864501730093. The reversal of 18864501730078 is 87003710546881.

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

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18864501730073) by changing a digit.

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, 4716125432518 + ... + 4716125432521.

It is an arithmetic number, because the mean of its divisors is an integer number (7074188148780).

Almost surely, 2^{18864501730078} is an apocalyptic number.

18864501730078 is a deficient number, since it is larger than the sum of its proper divisors (9432250865042).

18864501730078 is an equidigital number, since it uses as much as digits as its factorization.

18864501730078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9432250865041.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 18864501730078 in words is "eighteen trillion, eight hundred sixty-four billion, five hundred one million, seven hundred thirty thousand, seventy-eight".