18908968 has 32 divisors (see below), whose sum is σ = 38543400. Its totient is φ = 8644608.

The previous prime is 18908959. The next prime is 18908983. The reversal of 18908968 is 86980981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12945604 + 5963364 = 3598^2 + 2442^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10948 + ... + 12556.

Almost surely, 2^18908968 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 18908968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19271700).

18908968 is an abundant number, since it is smaller than the sum of its proper divisors (19634432).

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

18908968 is a wasteful number, since it uses less digits than its factorization.

18908968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741 (or 1737 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 18908968 is about 4348.4443195239. Note that the first 3 decimals coincide. The cubic root of 18908968 is about 266.4133246709.

The spelling of 18908968 in words is "eighteen million, nine hundred eight thousand, nine hundred sixty-eight".