18634705 has 8 divisors (see below), whose sum is σ = 22907304. Its totient is φ = 14544000.

The previous prime is 18634699. The next prime is 18634709. The reversal of 18634705 is 50743681.

It can be written as a sum of positive squares in 4 ways, for example, as 512656 + 18122049 = 716^2 + 4257^2 .

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

It is not a de Polignac number, because 18634705 - 2⁵ = 18634673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18634709) 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, 45246 + ... + 45655.

It is an arithmetic number, because the mean of its divisors is an integer number (2863413).

Almost surely, 2^18634705 is an apocalyptic number.

It is an amenable number.

18634705 is a deficient number, since it is larger than the sum of its proper divisors (4272599).

18634705 is an equidigital number, since it uses as much as digits as its factorization.

18634705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90947.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 18634705 is about 4316.7933700839. The cubic root of 18634705 is about 265.1189924848.

The spelling of 18634705 in words is "eighteen million, six hundred thirty-four thousand, seven hundred five".