20051273 has 6 divisors (see below), whose sum is σ = 22039962. Its totient is φ = 18228320.

The previous prime is 20051263. The next prime is 20051293. The reversal of 20051273 is 37215002.

It can be written as a sum of positive squares in only one way, i.e., 20043529 + 7744 = 4477^2 + 88^2 .

It is not a de Polignac number, because 20051273 - 2⁴ = 20051257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20051243) 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 5 ways as a sum of consecutive naturals, for example, 82736 + ... + 82977.

It is an arithmetic number, because the mean of its divisors is an integer number (3673327).

Almost surely, 2^20051273 is an apocalyptic number.

It is an amenable number.

20051273 is a deficient number, since it is larger than the sum of its proper divisors (1988689).

20051273 is a wasteful number, since it uses less digits than its factorization.

20051273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165735 (or 165724 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20051273 is about 4477.8647813439. The cubic root of 20051273 is about 271.6735242769.

Adding to 20051273 its reverse (37215002), we get a palindrome (57266275).

The spelling of 20051273 in words is "twenty million, fifty-one thousand, two hundred seventy-three".