21003230013 has 8 divisors (see below), whose sum is σ = 28007822400. Its totient is φ = 14000395488.

The previous prime is 21003229993. The next prime is 21003230033. The reversal of 21003230013 is 31003230012.

It is an interprime number because it is at equal distance from previous prime (21003229993) and next prime (21003230033).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21003230013 - 2⁵ = 21003229981 is a prime.

It is a super-2 number, since 2×21003230013² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003229974 and 21003230001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003230033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411328 + ... + 459561.

It is an arithmetic number, because the mean of its divisors is an integer number (3500977800).

Almost surely, 2^21003230013 is an apocalyptic number.

It is an amenable number.

21003230013 is a deficient number, since it is larger than the sum of its proper divisors (7004592387).

21003230013 is an equidigital number, since it uses as much as digits as its factorization.

21003230013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878931.

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

Adding to 21003230013 its reverse (31003230012), we get a palindrome (52006460025).

Subtracting 21003230013 from its reverse (31003230012), we obtain a palindrome (9999999999).

The spelling of 21003230013 in words is "twenty-one billion, three million, two hundred thirty thousand, thirteen".