18147052 has 72 divisors (see below), whose sum is σ = 42517440. Its totient is φ = 6683040.

The previous prime is 18147001. The next prime is 18147053. The reversal of 18147052 is 25074181.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18147052.

It is not an unprimeable number, because it can be changed into a prime (18147053) 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 23 ways as a sum of consecutive naturals, for example, 40743 + ... + 41185.

It is an arithmetic number, because the mean of its divisors is an integer number (590520).

Almost surely, 2^18147052 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 18147052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21258720).

18147052 is an abundant number, since it is smaller than the sum of its proper divisors (24370388).

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

18147052 is a wasteful number, since it uses less digits than its factorization.

18147052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18147052 is about 4259.9356802656. The cubic root of 18147052 is about 262.7858811347.

The spelling of 18147052 in words is "eighteen million, one hundred forty-seven thousand, fifty-two".