18441688623 has 8 divisors (see below), whose sum is σ = 24591563136. Its totient is φ = 12293136600.

The previous prime is 18441688589. The next prime is 18441688631. The reversal of 18441688623 is 32688614481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18441688623 - 2²² = 18437494319 is a prime.

It is a super-2 number, since 2×18441688623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18441684623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297613 + ... + 354198.

It is an arithmetic number, because the mean of its divisors is an integer number (3073945392).

Almost surely, 2^18441688623 is an apocalyptic number.

18441688623 is a deficient number, since it is larger than the sum of its proper divisors (6149874513).

18441688623 is an equidigital number, since it uses as much as digits as its factorization.

18441688623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661245.

The product of its digits is 1769472, while the sum is 51.

The spelling of 18441688623 in words is "eighteen billion, four hundred forty-one million, six hundred eighty-eight thousand, six hundred twenty-three".