20085473 has 4 divisors (see below), whose sum is σ = 20201748. Its totient is φ = 19969200.

The previous prime is 20085467. The next prime is 20085479. The reversal of 20085473 is 37458002.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20085467) and next prime (20085479).

It can be written as a sum of positive squares in 2 ways, for example, as 8196769 + 11888704 = 2863^2 + 3448^2 .

It is a cyclic number.

It is not a de Polignac number, because 20085473 - 2¹² = 20081377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20085479) 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 3 ways as a sum of consecutive naturals, for example, 57878 + ... + 58223.

It is an arithmetic number, because the mean of its divisors is an integer number (5050437).

Almost surely, 2^20085473 is an apocalyptic number.

It is an amenable number.

20085473 is a deficient number, since it is larger than the sum of its proper divisors (116275).

20085473 is a wasteful number, since it uses less digits than its factorization.

20085473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116274.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20085473 is about 4481.6819387368. The cubic root of 20085473 is about 271.8278944768.

The spelling of 20085473 in words is "twenty million, eighty-five thousand, four hundred seventy-three".