18231227834 has 4 divisors (see below), whose sum is σ = 27346841754. Its totient is φ = 9115613916.

The previous prime is 18231227803. The next prime is 18231227837. The reversal of 18231227834 is 43872213281.

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

It can be written as a sum of positive squares in only one way, i.e., 18050728609 + 180499225 = 134353^2 + 13435^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18231227791 and 18231227800.

It is not an unprimeable number, because it can be changed into a prime (18231227837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4557806957 + ... + 4557806960.

Almost surely, 2^18231227834 is an apocalyptic number.

18231227834 is a deficient number, since it is larger than the sum of its proper divisors (9115613920).

18231227834 is an equidigital number, since it uses as much as digits as its factorization.

18231227834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9115613919.

The product of its digits is 129024, while the sum is 41.

The spelling of 18231227834 in words is "eighteen billion, two hundred thirty-one million, two hundred twenty-seven thousand, eight hundred thirty-four".