18186072 has 16 divisors (see below), whose sum is σ = 45465240. Its totient is φ = 6062016.

The previous prime is 18186071. The next prime is 18186089. The reversal of 18186072 is 27068181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18186071) 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, 378853 + ... + 378900.

Almost surely, 2^18186072 is an apocalyptic number.

18186072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18186072 is an abundant number, since it is smaller than the sum of its proper divisors (27279168).

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

18186072 is a wasteful number, since it uses less digits than its factorization.

18186072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757762 (or 757758 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 18186072 is about 4264.5131023365. The cubic root of 18186072 is about 262.9740947078.

The spelling of 18186072 in words is "eighteen million, one hundred eighty-six thousand, seventy-two".