18813768 has 32 divisors (see below), whose sum is σ = 47140800. Its totient is φ = 6257088.

The previous prime is 18813763. The next prime is 18813787. The reversal of 18813768 is 86731881.

It is not an unprimeable number, because it can be changed into a prime (18813763) 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 7 ways as a sum of consecutive naturals, for example, 20013 + ... + 20931.

It is an arithmetic number, because the mean of its divisors is an integer number (1473150).

Almost surely, 2^18813768 is an apocalyptic number.

It is an amenable number.

18813768 is an abundant number, since it is smaller than the sum of its proper divisors (28327032).

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

18813768 is a wasteful number, since it uses less digits than its factorization.

18813768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1777 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 18813768 is about 4337.4840633713. The cubic root of 18813768 is about 265.9654731224.

The spelling of 18813768 in words is "eighteen million, eight hundred thirteen thousand, seven hundred sixty-eight".