18956916 has 96 divisors (see below), whose sum is σ = 54552960. Its totient is φ = 5715360.

The previous prime is 18956897. The next prime is 18956963. The reversal of 18956916 is 61965981.

18956916 is a `hidden beast` number, since 1 + 89 + 569 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96130 + ... + 96326.

It is an arithmetic number, because the mean of its divisors is an integer number (568260).

Almost surely, 2^18956916 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 18956916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27276480).

18956916 is an abundant number, since it is smaller than the sum of its proper divisors (35596044).

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

18956916 is a wasteful number, since it uses less digits than its factorization.

18956916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 213 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 18956916 is about 4353.9540649851. The cubic root of 18956916 is about 266.6383185143.

The spelling of 18956916 in words is "eighteen million, nine hundred fifty-six thousand, nine hundred sixteen".