18571968 has 84 divisors (see below), whose sum is σ = 56067960. Its totient is φ = 5861376.

The previous prime is 18571963. The next prime is 18571979. The reversal of 18571968 is 86917581.

18571968 is a `hidden beast` number, since 18 + 571 + 9 + 68 = 666.

It is not an unprimeable number, because it can be changed into a prime (18571963) 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, 10096 + ... + 11792.

Almost surely, 2^18571968 is an apocalyptic number.

18571968 is a gapful number since it is divisible by the number (18) 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 18571968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28033980).

18571968 is an abundant number, since it is smaller than the sum of its proper divisors (37495992).

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

18571968 is a wasteful number, since it uses less digits than its factorization.

18571968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1721 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 18571968 is about 4309.5206229928. The cubic root of 18571968 is about 264.8211347881.

The spelling of 18571968 in words is "eighteen million, five hundred seventy-one thousand, nine hundred sixty-eight".