18038161836 has 60 divisors (see below), whose sum is σ = 47363243928. Its totient is φ = 5986208448.

The previous prime is 18038161783. The next prime is 18038161837. The reversal of 18038161836 is 63816183081.

18038161836 is a `hidden beast` number, since 180 + 381 + 61 + 8 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18038161791 and 18038161800.

It is not an unprimeable number, because it can be changed into a prime (18038161837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49081 + ... + 196176.

Almost surely, 2^18038161836 is an apocalyptic number.

It is an amenable number.

18038161836 is an abundant number, since it is smaller than the sum of its proper divisors (29325082092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18038161836 is a wasteful number, since it uses less digits than its factorization.

18038161836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245500 (or 245489 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18038161836 in words is "eighteen billion, thirty-eight million, one hundred sixty-one thousand, eight hundred thirty-six".