18768005 has 8 divisors (see below), whose sum is σ = 22545432. Its totient is φ = 14998528.

The previous prime is 18767999. The next prime is 18768007. The reversal of 18768005 is 50086781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2879809 + 15888196 = 1697^2 + 3986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18768005 - 2¹⁰ = 18766981 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 (18768007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6557 + ... + 8973.

It is an arithmetic number, because the mean of its divisors is an integer number (2818179).

Almost surely, 2^18768005 is an apocalyptic number.

It is an amenable number.

18768005 is a deficient number, since it is larger than the sum of its proper divisors (3777427).

18768005 is a wasteful number, since it uses less digits than its factorization.

18768005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3975.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 18768005 is about 4332.2055583732. The cubic root of 18768005 is about 265.7496513912.

The spelling of 18768005 in words is "eighteen million, seven hundred sixty-eight thousand, five".