18727045 has 8 divisors (see below), whose sum is σ = 22496760. Its totient is φ = 14965440.

The previous prime is 18727021. The next prime is 18727057. The reversal of 18727045 is 54072781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1028196 + 17698849 = 1014^2 + 4207^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-18727045 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18727045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5835 + ... + 8455.

It is an arithmetic number, because the mean of its divisors is an integer number (2812095).

Almost surely, 2^18727045 is an apocalyptic number.

It is an amenable number.

18727045 is a deficient number, since it is larger than the sum of its proper divisors (3769715).

18727045 is a wasteful number, since it uses less digits than its factorization.

18727045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 18727045 is about 4327.4755920744. The cubic root of 18727045 is about 265.5561832340.

The spelling of 18727045 in words is "eighteen million, seven hundred twenty-seven thousand, forty-five".