18186036 has 48 divisors (see below), whose sum is σ = 46545408. Its totient is φ = 5480800.

The previous prime is 18186023. The next prime is 18186053. The reversal of 18186036 is 63068181.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 18185988 and 18186006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40831 + ... + 41273.

It is an arithmetic number, because the mean of its divisors is an integer number (969696).

Almost surely, 2^18186036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18186036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23272704).

18186036 is an abundant number, since it is smaller than the sum of its proper divisors (28359372).

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

18186036 is a wasteful number, since it uses less digits than its factorization.

18186036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18186036 is about 4264.5088814540. The cubic root of 18186036 is about 262.9739211854.

The spelling of 18186036 in words is "eighteen million, one hundred eighty-six thousand, thirty-six".