21023003013 has 16 divisors (see below), whose sum is σ = 28358870400. Its totient is φ = 13851383040.

The previous prime is 21023002999. The next prime is 21023003033. The reversal of 21023003013 is 31030032012.

It is not a de Polignac number, because 21023003013 - 2²⁸ = 20754567557 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21023002983 and 21023003001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023003033) 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, 591768 + ... + 626286.

It is an arithmetic number, because the mean of its divisors is an integer number (1772429400).

Almost surely, 2^21023003013 is an apocalyptic number.

It is an amenable number.

21023003013 is a deficient number, since it is larger than the sum of its proper divisors (7335867387).

21023003013 is a wasteful number, since it uses less digits than its factorization.

21023003013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36892.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21023003013 its reverse (31030032012), we get a palindrome (52053035025).

The spelling of 21023003013 in words is "twenty-one billion, twenty-three million, three thousand, thirteen".