20001223003 has 4 divisors (see below), whose sum is σ = 20466367768. Its totient is φ = 19536078240.

The previous prime is 20001222991. The next prime is 20001223007. The reversal of 20001223003 is 30032210002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30032210002 = 2 ⋅15016105001.

It is a cyclic number.

It is not a de Polignac number, because 20001223003 - 2²⁹ = 19464352091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001223007) 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, 232572318 + ... + 232572403.

It is an arithmetic number, because the mean of its divisors is an integer number (5116591942).

Almost surely, 2^20001223003 is an apocalyptic number.

20001223003 is a deficient number, since it is larger than the sum of its proper divisors (465144765).

20001223003 is an equidigital number, since it uses as much as digits as its factorization.

20001223003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465144764.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20001223003 its reverse (30032210002), we get a palindrome (50033433005).

The spelling of 20001223003 in words is "twenty billion, one million, two hundred twenty-three thousand, three".