18080705 has 8 divisors (see below), whose sum is σ = 22052904. Its totient is φ = 14227200.

The previous prime is 18080681. The next prime is 18080731. The reversal of 18080705 is 50708081.

18080705 = 75² + 76² + ... + 379².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1048576 + 17032129 = 1024^2 + 4127^2 .

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

It is not a de Polignac number, because 18080705 - 2⁶ = 18080641 is a prime.

It is a Duffinian 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, 29336 + ... + 29945.

It is an arithmetic number, because the mean of its divisors is an integer number (2756613).

Almost surely, 2^18080705 is an apocalyptic number.

It is an amenable number.

18080705 is a deficient number, since it is larger than the sum of its proper divisors (3972199).

18080705 is an equidigital number, since it uses as much as digits as its factorization.

18080705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59347.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 18080705 is about 4252.1412253123. The cubic root of 18080705 is about 262.4652350029.

Adding to 18080705 its reverse (50708081), we get a palindrome (68788786).

The spelling of 18080705 in words is "eighteen million, eighty thousand, seven hundred five".