18572 has 6 divisors (see below), whose sum is σ = 32508. Its totient is φ = 9284.

The previous prime is 18553. The next prime is 18583. The reversal of 18572 is 27581.

It is a plaindrome in base 16.

It is an unprimeable number.

18572 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2318 + ... + 2325.

It is an arithmetic number, because the mean of its divisors is an integer number (5418).

2^{18572} is an apocalyptic number.

It is an amenable number.

18572 is a deficient number, since it is larger than the sum of its proper divisors (13936).

18572 is a wasteful number, since it uses less digits than its factorization.

18572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4647 (or 4645 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 18572 is about 136.2791253274. The cubic root of 18572 is about 26.4821286886.

Subtracting 18572 from its reverse (27581), we obtain a palindrome (9009).

It can be divided in two parts, 18 and 572, that multiplied together give a triangular number (10296 = T_{143}).

The spelling of 18572 in words is "eighteen thousand, five hundred seventy-two".

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