20304105 has 8 divisors (see below), whose sum is σ = 32486592. Its totient is φ = 10828848.

The previous prime is 20304091. The next prime is 20304121. The reversal of 20304105 is 50140302.

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

It is not a de Polignac number, because 20304105 - 2²¹ = 18206953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1353607 = 20304105 / (2 + 0 + 3 + 0 + 4 + 1 + 0 + 5).

It is an unprimeable number.

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, 676789 + ... + 676818.

It is an arithmetic number, because the mean of its divisors is an integer number (4060824).

Almost surely, 2^20304105 is an apocalyptic number.

It is an amenable number.

20304105 is a deficient number, since it is larger than the sum of its proper divisors (12182487).

20304105 is a wasteful number, since it uses less digits than its factorization.

20304105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353615.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20304105 is about 4506.0076564516. The cubic root of 20304105 is about 272.8106268954.

Adding to 20304105 its reverse (50140302), we get a palindrome (70444407).

The spelling of 20304105 in words is "twenty million, three hundred four thousand, one hundred five".