20304151 has 8 divisors (see below), whose sum is σ = 23239584. Its totient is φ = 17377440.

The previous prime is 20304139. The next prime is 20304161. The reversal of 20304151 is 15140302.

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

It is a cyclic number.

It is not a de Polignac number, because 20304151 - 2⁷ = 20304023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20304121) 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, 3981 + ... + 7513.

It is an arithmetic number, because the mean of its divisors is an integer number (2904948).

Almost surely, 2^20304151 is an apocalyptic number.

20304151 is a deficient number, since it is larger than the sum of its proper divisors (2935433).

20304151 is an equidigital number, since it uses as much as digits as its factorization.

20304151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361.

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

The square root of 20304151 is about 4506.0127607454. The cubic root of 20304151 is about 272.8108329175.

Adding to 20304151 its reverse (15140302), we get a palindrome (35444453).

The spelling of 20304151 in words is "twenty million, three hundred four thousand, one hundred fifty-one".