2020403 has 16 divisors (see below), whose sum is σ = 2653440. Its totient is φ = 1490400.

The previous prime is 2020393. The next prime is 2020409. The reversal of 2020403 is 3040202.

It is a cyclic number.

It is not a de Polignac number, because 2020403 - 2⁴ = 2020387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773 + ... + 2153.

It is an arithmetic number, because the mean of its divisors is an integer number (165840).

2^2020403 is an apocalyptic number.

2020403 is a deficient number, since it is larger than the sum of its proper divisors (633037).

2020403 is a wasteful number, since it uses less digits than its factorization.

2020403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 2020403 is about 1421.4088081900. The cubic root of 2020403 is about 126.4190924466.

Adding to 2020403 its reverse (3040202), we get a palindrome (5060605).

The spelling of 2020403 in words is "two million, twenty thousand, four hundred three".