18768825 has 18 divisors (see below), whose sum is σ = 33617454. Its totient is φ = 10009920.

The previous prime is 18768817. The next prime is 18768859. The reversal of 18768825 is 52886781.

It can be written as a sum of positive squares in 3 ways, for example, as 2601 + 18766224 = 51^2 + 4332^2 .

It is not a de Polignac number, because 18768825 - 2³ = 18768817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41484 + ... + 41933.

Almost surely, 2^18768825 is an apocalyptic number.

18768825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18768825 is a deficient number, since it is larger than the sum of its proper divisors (14848629).

18768825 is a wasteful number, since it uses less digits than its factorization.

18768825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83433 (or 83425 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 18768825 is about 4332.3001973547. The cubic root of 18768825 is about 265.7535216576.

It can be divided in two parts, 1876 and 8825, that added together give a palindrome (10701).

The spelling of 18768825 in words is "eighteen million, seven hundred sixty-eight thousand, eight hundred twenty-five".