20304873 has 6 divisors (see below), whose sum is σ = 29329274. Its totient is φ = 13536576.

The previous prime is 20304839. The next prime is 20304899. The reversal of 20304873 is 37840302.

It can be written as a sum of positive squares in only one way, i.e., 19079424 + 1225449 = 4368^2 + 1107^2 .

It is not a de Polignac number, because 20304873 - 2⁸ = 20304617 is a prime.

It is a super-2 number, since 2×20304873² = 824575735092258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20304803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128040 + ... + 1128057.

Almost surely, 2^20304873 is an apocalyptic number.

It is an amenable number.

20304873 is a deficient number, since it is larger than the sum of its proper divisors (9024401).

20304873 is a wasteful number, since it uses less digits than its factorization.

20304873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256103 (or 2256100 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20304873 is about 4506.0928752080. The cubic root of 20304873 is about 272.8140665270.

It can be divided in two parts, 2030 and 4873, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 20304873 in words is "twenty million, three hundred four thousand, eight hundred seventy-three".