18703705 has 8 divisors (see below), whose sum is σ = 22510152. Its totient is φ = 14919168.

The previous prime is 18703703. The next prime is 18703709. The reversal of 18703705 is 50730781.

It can be written as a sum of positive squares in 4 ways, for example, as 15376 + 18688329 = 124^2 + 4323^2 .

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 18703705 - 2¹ = 18703703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18703703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3534 + ... + 7063.

It is an arithmetic number, because the mean of its divisors is an integer number (2813769).

Almost surely, 2^18703705 is an apocalyptic number.

It is an amenable number.

18703705 is a deficient number, since it is larger than the sum of its proper divisors (3806447).

18703705 is a wasteful number, since it uses less digits than its factorization.

18703705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10955.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 18703705 is about 4324.7780289860. The cubic root of 18703705 is about 265.4458141921.

The spelling of 18703705 in words is "eighteen million, seven hundred three thousand, seven hundred five".