18748745 has 8 divisors (see below), whose sum is σ = 22581384. Its totient is φ = 14943744.

The previous prime is 18748733. The next prime is 18748771. The reversal of 18748745 is 54784781.

It can be written as a sum of positive squares in 4 ways, for example, as 3671056 + 15077689 = 1916^2 + 3883^2 .

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 18748745 - 2¹⁴ = 18732361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18748696 and 18748705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5384 + ... + 8153.

It is an arithmetic number, because the mean of its divisors is an integer number (2822673).

Almost surely, 2^18748745 is an apocalyptic number.

It is an amenable number.

18748745 is a deficient number, since it is larger than the sum of its proper divisors (3832639).

18748745 is a wasteful number, since it uses less digits than its factorization.

18748745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13819.

The product of its digits is 250880, while the sum is 44.

The square root of 18748745 is about 4329.9821015796. The cubic root of 18748745 is about 265.6587148901.

The spelling of 18748745 in words is "eighteen million, seven hundred forty-eight thousand, seven hundred forty-five".