18859968 has 84 divisors (see below), whose sum is σ = 54681120. Its totient is φ = 6214656.

The previous prime is 18859963. The next prime is 18859979. The reversal of 18859968 is 86995881.

It is a super-2 number, since 2×18859968² = 711396785922048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18859961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78793 + ... + 79031.

Almost surely, 2^18859968 is an apocalyptic number.

18859968 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 18859968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27340560).

18859968 is an abundant number, since it is smaller than the sum of its proper divisors (35821152).

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

18859968 is a wasteful number, since it uses less digits than its factorization.

18859968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 381 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 18859968 is about 4342.8064658697. The cubic root of 18859968 is about 266.1830010616.

The spelling of 18859968 in words is "eighteen million, eight hundred fifty-nine thousand, nine hundred sixty-eight".