21230411403 has 4 divisors (see below), whose sum is σ = 28307215208. Its totient is φ = 14153607600.

The previous prime is 21230411399. The next prime is 21230411413. The reversal of 21230411403 is 30411403212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21230411403 - 2² = 21230411399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21230411403.

It is not an unprimeable number, because it can be changed into a prime (21230411413) 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, 3538401898 + ... + 3538401903.

It is an arithmetic number, because the mean of its divisors is an integer number (7076803802).

Almost surely, 2^21230411403 is an apocalyptic number.

21230411403 is a deficient number, since it is larger than the sum of its proper divisors (7076803805).

21230411403 is an equidigital number, since it uses as much as digits as its factorization.

21230411403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7076803804.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21230411403 its reverse (30411403212), we get a palindrome (51641814615).

The spelling of 21230411403 in words is "twenty-one billion, two hundred thirty million, four hundred eleven thousand, four hundred three".