20304879 has 16 divisors (see below), whose sum is σ = 31050240. Its totient is φ = 11561760.

The previous prime is 20304839. The next prime is 20304899. The reversal of 20304879 is 97840302.

It is not a de Polignac number, because 20304879 - 2⁷ = 20304751 is a prime.

It is a super-2 number, since 2×20304879² = 824576222409282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20304829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4977 + ... + 8085.

It is an arithmetic number, because the mean of its divisors is an integer number (1940640).

Almost surely, 2^20304879 is an apocalyptic number.

20304879 is a deficient number, since it is larger than the sum of its proper divisors (10745361).

20304879 is a wasteful number, since it uses less digits than its factorization.

20304879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20304879 is about 4506.0935409732. The cubic root of 20304879 is about 272.8140933988.

The spelling of 20304879 in words is "twenty million, three hundred four thousand, eight hundred seventy-nine".