20304115 has 8 divisors (see below), whose sum is σ = 26239248. Its totient is φ = 14993760.

The previous prime is 20304091. The next prime is 20304121. The reversal of 20304115 is 51140302.

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

It is not a de Polignac number, because 20304115 - 2¹¹ = 20302067 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, 156121 + ... + 156250.

It is an arithmetic number, because the mean of its divisors is an integer number (3279906).

Almost surely, 2^20304115 is an apocalyptic number.

20304115 is a deficient number, since it is larger than the sum of its proper divisors (5935133).

20304115 is a wasteful number, since it uses less digits than its factorization.

20304115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312389.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20304115 is about 4506.0087660811. The cubic root of 20304115 is about 272.8106716829.

Adding to 20304115 its reverse (51140302), we get a palindrome (71444417).

The spelling of 20304115 in words is "twenty million, three hundred four thousand, one hundred fifteen".