18723056 has 60 divisors (see below), whose sum is σ = 42054600. Its totient is φ = 8046720.

The previous prime is 18723053. The next prime is 18723109. The reversal of 18723056 is 65032781.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18723053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36530 + ... + 37038.

It is an arithmetic number, because the mean of its divisors is an integer number (700910).

Almost surely, 2^18723056 is an apocalyptic number.

18723056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18723056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21027300).

18723056 is an abundant number, since it is smaller than the sum of its proper divisors (23331544).

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

18723056 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 18723056 = (38206175)₉.

18723056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 18723056 is about 4327.0146752698. The cubic root of 18723056 is about 265.5373267471.

The spelling of 18723056 in words is "eighteen million, seven hundred twenty-three thousand, fifty-six".