18105958957623 has 4 divisors (see below), whose sum is σ = 24141278610168. Its totient is φ = 12070639305080.

The previous prime is 18105958957621. The next prime is 18105958957631. The reversal of 18105958957623 is 32675985950181.

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 18105958957623 - 2¹ = 18105958957621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18105958957621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017659826268 + ... + 3017659826273.

It is an arithmetic number, because the mean of its divisors is an integer number (6035319652542).

Almost surely, 2^{18105958957623} is an apocalyptic number.

18105958957623 is a deficient number, since it is larger than the sum of its proper divisors (6035319652545).

18105958957623 is an equidigital number, since it uses as much as digits as its factorization.

18105958957623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035319652544.

The product of its (nonzero) digits is 163296000, while the sum is 69.

The spelling of 18105958957623 in words is "eighteen trillion, one hundred five billion, nine hundred fifty-eight million, nine hundred fifty-seven thousand, six hundred twenty-three".