18426275911 has 4 divisors (see below), whose sum is σ = 19510174512. Its totient is φ = 17342377312.

The previous prime is 18426275897. The next prime is 18426275929. The reversal of 18426275911 is 11957262481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11957262481 = 103 ⋅116089927.

It is a cyclic number.

It is not a de Polignac number, because 18426275911 - 2¹¹ = 18426273863 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 (18426275011) 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, 541949275 + ... + 541949308.

It is an arithmetic number, because the mean of its divisors is an integer number (4877543628).

Almost surely, 2^18426275911 is an apocalyptic number.

18426275911 is a deficient number, since it is larger than the sum of its proper divisors (1083898601).

18426275911 is a wasteful number, since it uses less digits than its factorization.

18426275911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083898600.

The product of its digits is 241920, while the sum is 46.

The spelling of 18426275911 in words is "eighteen billion, four hundred twenty-six million, two hundred seventy-five thousand, nine hundred eleven".