1020323503 has 16 divisors (see below), whose sum is σ = 1101425920. Its totient is φ = 942264576.

The previous prime is 1020323471. The next prime is 1020323573. The reversal of 1020323503 is 3053230201.

It is a cyclic number.

It is not a de Polignac number, because 1020323503 - 2⁵ = 1020323471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020323573) 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, 119350 + ... + 127612.

It is an arithmetic number, because the mean of its divisors is an integer number (68839120).

Almost surely, 2^1020323503 is an apocalyptic number.

1020323503 is a deficient number, since it is larger than the sum of its proper divisors (81102417).

1020323503 is an equidigital number, since it uses as much as digits as its factorization.

1020323503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8446.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 1020323503 is about 31942.5030797525. The cubic root of 1020323503 is about 1006.7291183984.

Adding to 1020323503 its reverse (3053230201), we get a palindrome (4073553704).

The spelling of 1020323503 in words is "one billion, twenty million, three hundred twenty-three thousand, five hundred three".