18355036 has 24 divisors (see below), whose sum is σ = 38870496. Its totient is φ = 7403520.

The previous prime is 18355031. The next prime is 18355039. The reversal of 18355036 is 63055381.

It is a super-2 number, since 2×18355036² = 673814693122592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18354989 and 18355007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18355031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18805 + ... + 19756.

It is an arithmetic number, because the mean of its divisors is an integer number (1619604).

Almost surely, 2^18355036 is an apocalyptic number.

It is an amenable number.

18355036 is an abundant number, since it is smaller than the sum of its proper divisors (20515460).

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

18355036 is a wasteful number, since it uses less digits than its factorization.

18355036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38589 (or 38587 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 18355036 is about 4284.2777687727. The cubic root of 18355036 is about 263.7860027371.

The spelling of 18355036 in words is "eighteen million, three hundred fifty-five thousand, thirty-six".