2820203 has 4 divisors (see below), whose sum is σ = 2823600. Its totient is φ = 2816808.

The previous prime is 2820197. The next prime is 2820211. The reversal of 2820203 is 3020282.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3020282 = 2 ⋅1510141.

It is a cyclic number.

It is not a de Polignac number, because 2820203 - 2¹⁴ = 2803819 is a prime.

It is a super-2 number, since 2×2820203² = 15907089922418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2820263) 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, 473 + ... + 2421.

It is an arithmetic number, because the mean of its divisors is an integer number (705900).

2^2820203 is an apocalyptic number.

2820203 is a deficient number, since it is larger than the sum of its proper divisors (3397).

2820203 is a wasteful number, since it uses less digits than its factorization.

2820203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2820203 is about 1679.3460036574. The cubic root of 2820203 is about 141.2841544264.

Adding to 2820203 its reverse (3020282), we get a palindrome (5840485).

The spelling of 2820203 in words is "two million, eight hundred twenty thousand, two hundred three".