21000223003 has 4 divisors (see below), whose sum is σ = 21000668040. Its totient is φ = 20999777968.

The previous prime is 21000222989. The next prime is 21000223021. The reversal of 21000223003 is 30032200012.

It is a happy number.

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 21000223003 - 2²⁵ = 20966668571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000223033) 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, 142033 + ... + 249346.

It is an arithmetic number, because the mean of its divisors is an integer number (5250167010).

Almost surely, 2^21000223003 is an apocalyptic number.

21000223003 is a deficient number, since it is larger than the sum of its proper divisors (445037).

21000223003 is an equidigital number, since it uses as much as digits as its factorization.

21000223003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445036.

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

Adding to 21000223003 its reverse (30032200012), we get a palindrome (51032423015).

The spelling of 21000223003 in words is "twenty-one billion, two hundred twenty-three thousand, three".