18816768 has 54 divisors (see below), whose sum is σ = 54260024. Its totient is φ = 6271488.

The previous prime is 18816767. The next prime is 18816793. The reversal of 18816768 is 86761881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18816767) 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 5 ways as a sum of consecutive naturals, for example, 1780 + ... + 6387.

Almost surely, 2^18816768 is an apocalyptic number.

18816768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18816768 is an abundant number, since it is smaller than the sum of its proper divisors (35443256).

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

18816768 is an equidigital number, since it uses as much as digits as its factorization.

18816768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189 (or 8172 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 18816768 is about 4337.8298721826. The cubic root of 18816768 is about 265.9796091178.

It can be divided in two parts, 1881 and 6768, that added together give a square (8649 = 93²).

The spelling of 18816768 in words is "eighteen million, eight hundred sixteen thousand, seven hundred sixty-eight".