18361016521828 has 12 divisors (see below), whose sum is σ = 32132037144060. Its totient is φ = 9180434480672.

The previous prime is 18361016521819. The next prime is 18361016521829. The reversal of 18361016521828 is 82812561016381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6338098283364 + 12022918238464 = 2517558^2 + 3467408^2 .

It is not an unprimeable number, because it can be changed into a prime (18361016521829) 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, 17883223 + ... + 18882046.

It is an arithmetic number, because the mean of its divisors is an integer number (2677669762005).

Almost surely, 2^{18361016521828} is an apocalyptic number.

It is an amenable number.

18361016521828 is a deficient number, since it is larger than the sum of its proper divisors (13771020622232).

18361016521828 is a wasteful number, since it uses less digits than its factorization.

18361016521828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36890126 (or 36890124 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 18361016521828 in words is "eighteen trillion, three hundred sixty-one billion, sixteen million, five hundred twenty-one thousand, eight hundred twenty-eight".