20204073 has 10 divisors (see below), whose sum is σ = 30181514. Its totient is φ = 13469328.

The previous prime is 20204071. The next prime is 20204081. The reversal of 20204073 is 37040202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18429849 + 1774224 = 4293^2 + 1332^2 .

It is not a de Polignac number, because 20204073 - 2¹ = 20204071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20204071) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124636 + ... + 124797.

Almost surely, 2^20204073 is an apocalyptic number.

It is an amenable number.

20204073 is a deficient number, since it is larger than the sum of its proper divisors (9977441).

20204073 is an equidigital number, since it uses as much as digits as its factorization.

20204073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249445 (or 249436 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20204073 is about 4494.8941033132. The cubic root of 20204073 is about 272.3618714705.

Adding to 20204073 its reverse (37040202), we get a palindrome (57244275).

The spelling of 20204073 in words is "twenty million, two hundred four thousand, seventy-three".