18768775 has 12 divisors (see below), whose sum is σ = 23842224. Its totient is φ = 14648000.

The previous prime is 18768773. The next prime is 18768793. The reversal of 18768775 is 57786781.

It is not a de Polignac number, because 18768775 - 2¹ = 18768773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18768773) 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, 8131 + ... + 10180.

It is an arithmetic number, because the mean of its divisors is an integer number (1986852).

Almost surely, 2^18768775 is an apocalyptic number.

18768775 is a deficient number, since it is larger than the sum of its proper divisors (5073449).

18768775 is a wasteful number, since it uses less digits than its factorization.

18768775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18362 (or 18357 counting only the distinct ones).

The product of its digits is 658560, while the sum is 49.

The square root of 18768775 is about 4332.2944267443. The cubic root of 18768775 is about 265.7532856690.

The spelling of 18768775 in words is "eighteen million, seven hundred sixty-eight thousand, seven hundred seventy-five".