18714805 has 4 divisors (see below), whose sum is σ = 22457772. Its totient is φ = 14971840.

The previous prime is 18714799. The next prime is 18714809. The reversal of 18714805 is 50841781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6832996 + 11881809 = 2614^2 + 3447^2 .

It is not a de Polignac number, because 18714805 - 2³ = 18714797 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 (18714809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1871476 + ... + 1871485.

It is an arithmetic number, because the mean of its divisors is an integer number (5614443).

Almost surely, 2^18714805 is an apocalyptic number.

It is an amenable number.

18714805 is a deficient number, since it is larger than the sum of its proper divisors (3742967).

18714805 is an equidigital number, since it uses as much as digits as its factorization.

18714805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742966.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 18714805 is about 4326.0611415004. The cubic root of 18714805 is about 265.4983147681.

The spelling of 18714805 in words is "eighteen million, seven hundred fourteen thousand, eight hundred five".