1020203403 has 4 divisors (see below), whose sum is σ = 1360271208. Its totient is φ = 680135600.

The previous prime is 1020203329. The next prime is 1020203411. The reversal of 1020203403 is 3043020201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020203403 - 2⁸ = 1020203147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020203453) 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, 170033898 + ... + 170033903.

It is an arithmetic number, because the mean of its divisors is an integer number (340067802).

Almost surely, 2^1020203403 is an apocalyptic number.

1020203403 is a deficient number, since it is larger than the sum of its proper divisors (340067805).

1020203403 is an equidigital number, since it uses as much as digits as its factorization.

1020203403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340067804.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1020203403 is about 31940.6230840915. The cubic root of 1020203403 is about 1006.6896169034.

Adding to 1020203403 its reverse (3043020201), we get a palindrome (4063223604).

The spelling of 1020203403 in words is "one billion, twenty million, two hundred three thousand, four hundred three".