18056346 has 128 divisors (see below), whose sum is σ = 50595840. Its totient is φ = 4181760.

The previous prime is 18056341. The next prime is 18056347. The reversal of 18056346 is 64365081.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18056341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 950325 + ... + 950343.

It is an arithmetic number, because the mean of its divisors is an integer number (395280).

Almost surely, 2^18056346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18056346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25297920).

18056346 is an abundant number, since it is smaller than the sum of its proper divisors (32539494).

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

18056346 is a wasteful number, since it uses less digits than its factorization.

18056346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 18056346 is about 4249.2759383217. The cubic root of 18056346 is about 262.3473143808.

The spelling of 18056346 in words is "eighteen million, fifty-six thousand, three hundred forty-six".