20584873 has 2 divisors, whose sum is σ = 20584874. Its totient is φ = 20584872.

The previous prime is 20584853. The next prime is 20584897. The reversal of 20584873 is 37848502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18429849 + 2155024 = 4293^2 + 1468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20584873 is a prime.

It is a super-2 number, since 2×20584873² = 847473992852258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20584843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10292436 + 10292437.

It is an arithmetic number, because the mean of its divisors is an integer number (10292437).

Almost surely, 2^20584873 is an apocalyptic number.

It is an amenable number.

20584873 is a deficient number, since it is larger than the sum of its proper divisors (1).

20584873 is an equidigital number, since it uses as much as digits as its factorization.

20584873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20584873 is about 4537.0555429706. The cubic root of 20584873 is about 274.0623625967.

It can be divided in two parts, 205 and 84873, that added together give a triangular number (85078 = T₄₁₂).

The spelling of 20584873 in words is "twenty million, five hundred eighty-four thousand, eight hundred seventy-three".