18272331128 has 8 divisors (see below), whose sum is σ = 34260620880. Its totient is φ = 9136165560.

The previous prime is 18272331113. The next prime is 18272331139. The reversal of 18272331128 is 82113327281.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 18272331091 and 18272331100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1142020688 + ... + 1142020703.

It is an arithmetic number, because the mean of its divisors is an integer number (4282577610).

Almost surely, 2^18272331128 is an apocalyptic number.

It is an amenable number.

18272331128 is a deficient number, since it is larger than the sum of its proper divisors (15988289752).

18272331128 is a wasteful number, since it uses less digits than its factorization.

18272331128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284041397 (or 2284041393 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The spelling of 18272331128 in words is "eighteen billion, two hundred seventy-two million, three hundred thirty-one thousand, one hundred twenty-eight".