18111367828 has 6 divisors (see below), whose sum is σ = 31694893706. Its totient is φ = 9055683912.

The previous prime is 18111367811. The next prime is 18111367831. The reversal of 18111367828 is 82876311181.

It can be written as a sum of positive squares in only one way, i.e., 14209116804 + 3902251024 = 119202^2 + 62468^2 .

It is a super-2 number, since 2×18111367828² (a number of 21 digits) contains 22 as substring.

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, 2263920975 + ... + 2263920982.

Almost surely, 2^18111367828 is an apocalyptic number.

It is an amenable number.

18111367828 is a deficient number, since it is larger than the sum of its proper divisors (13583525878).

18111367828 is a wasteful number, since it uses less digits than its factorization.

18111367828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527841961 (or 4527841959 counting only the distinct ones).

The product of its digits is 129024, while the sum is 46.

The spelling of 18111367828 in words is "eighteen billion, one hundred eleven million, three hundred sixty-seven thousand, eight hundred twenty-eight".