20003273 has 4 divisors (see below), whose sum is σ = 20543940. Its totient is φ = 19462608.

The previous prime is 20003267. The next prime is 20003287. The reversal of 20003273 is 37230002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18079504 + 1923769 = 4252^2 + 1387^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003273 - 2¹⁸ = 19741129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270278 + ... + 270351.

It is an arithmetic number, because the mean of its divisors is an integer number (5135985).

Almost surely, 2^20003273 is an apocalyptic number.

It is an amenable number.

20003273 is a deficient number, since it is larger than the sum of its proper divisors (540667).

20003273 is an equidigital number, since it uses as much as digits as its factorization.

20003273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540666.

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 20003273 is about 4472.5018725541. The cubic root of 20003273 is about 271.4565679999.

Adding to 20003273 its reverse (37230002), we get a palindrome (57233275).

The spelling of 20003273 in words is "twenty million, three thousand, two hundred seventy-three".