2003001023 has 4 divisors (see below), whose sum is σ = 2090088048. Its totient is φ = 1915914000.

The previous prime is 2003001001. The next prime is 2003001041. The reversal of 2003001023 is 3201003002.

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 2003001023 - 2⁶ = 2003000959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003000995 and 2003001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003001073) 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, 43543478 + ... + 43543523.

It is an arithmetic number, because the mean of its divisors is an integer number (522522012).

Almost surely, 2^2003001023 is an apocalyptic number.

2003001023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2003001023 is a deficient number, since it is larger than the sum of its proper divisors (87087025).

2003001023 is an equidigital number, since it uses as much as digits as its factorization.

2003001023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87087024.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 2003001023 is about 44754.8994301183. The cubic root of 2003001023 is about 1260.5509103037.

Adding to 2003001023 its reverse (3201003002), we get a palindrome (5204004025).

The spelling of 2003001023 in words is "two billion, three million, one thousand, twenty-three".