18956056 has 32 divisors (see below), whose sum is σ = 41185440. Its totient is φ = 8011008.

The previous prime is 18956009. The next prime is 18956057. The reversal of 18956056 is 65065981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18956057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1770 + ... + 6406.

It is an arithmetic number, because the mean of its divisors is an integer number (1287045).

Almost surely, 2^18956056 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 18956056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20592720).

18956056 is an abundant number, since it is smaller than the sum of its proper divisors (22229384).

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

18956056 is a wasteful number, since it uses less digits than its factorization.

18956056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4723 (or 4719 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 18956056 is about 4353.8553030619. The cubic root of 18956056 is about 266.6342863461.

The spelling of 18956056 in words is "eighteen million, nine hundred fifty-six thousand, fifty-six".