18423126403 has 6 divisors (see below), whose sum is σ = 20250213452. Its totient is φ = 16748296620.

The previous prime is 18423126401. The next prime is 18423126413. The reversal of 18423126403 is 30462132481.

It is not a de Polignac number, because 18423126403 - 2¹ = 18423126401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18423126401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76128501 + ... + 76128742.

Almost surely, 2^18423126403 is an apocalyptic number.

18423126403 is a deficient number, since it is larger than the sum of its proper divisors (1827087049).

18423126403 is a wasteful number, since it uses less digits than its factorization.

18423126403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152257265 (or 152257254 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 18423126403 its reverse (30462132481), we get a palindrome (48885258884).

The spelling of 18423126403 in words is "eighteen billion, four hundred twenty-three million, one hundred twenty-six thousand, four hundred three".