18623550623 has 4 divisors (see below), whose sum is σ = 18643816560. Its totient is φ = 18603284688.

The previous prime is 18623550601. The next prime is 18623550689. The reversal of 18623550623 is 32605532681.

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

It is a cyclic number.

It is not a de Polignac number, because 18623550623 - 2³⁰ = 17549808799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18623555623) 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 in 3 ways as a sum of consecutive naturals, for example, 10131590 + ... + 10133427.

It is an arithmetic number, because the mean of its divisors is an integer number (4660954140).

Almost surely, 2^18623550623 is an apocalyptic number.

18623550623 is a deficient number, since it is larger than the sum of its proper divisors (20265937).

18623550623 is an equidigital number, since it uses as much as digits as its factorization.

18623550623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20265936.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 18623550623 in words is "eighteen billion, six hundred twenty-three million, five hundred fifty thousand, six hundred twenty-three".