20304146 has 4 divisors (see below), whose sum is σ = 30456222. Its totient is φ = 10152072.

The previous prime is 20304139. The next prime is 20304161. The reversal of 20304146 is 64140302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19758025 + 546121 = 4445^2 + 739^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5076035 + ... + 5076038.

Almost surely, 2^20304146 is an apocalyptic number.

20304146 is a deficient number, since it is larger than the sum of its proper divisors (10152076).

20304146 is a wasteful number, since it uses less digits than its factorization.

20304146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10152075.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20304146 is about 4506.0122059311. The cubic root of 20304146 is about 272.8108105238.

Adding to 20304146 its reverse (64140302), we get a palindrome (84444448).

The spelling of 20304146 in words is "twenty million, three hundred four thousand, one hundred forty-six".