20533203 has 8 divisors (see below), whose sum is σ = 30419600. Its totient is φ = 13688784.

The previous prime is 20533159. The next prime is 20533213. The reversal of 20533203 is 30233502.

It is not a de Polignac number, because 20533203 - 2¹⁷ = 20402131 is a prime.

It is a super-2 number, since 2×20533203² = 843224850878418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20533213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380218 + ... + 380271.

It is an arithmetic number, because the mean of its divisors is an integer number (3802450).

Almost surely, 2^20533203 is an apocalyptic number.

20533203 is a deficient number, since it is larger than the sum of its proper divisors (9886397).

20533203 is an equidigital number, since it uses as much as digits as its factorization.

20533203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760498 (or 760492 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 20533203 is about 4531.3577435466. The cubic root of 20533203 is about 273.8328628867.

Adding to 20533203 its reverse (30233502), we get a palindrome (50766705).

It can be divided in two parts, 20533 and 203, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20533203 in words is "twenty million, five hundred thirty-three thousand, two hundred three".