21433030403 has 4 divisors (see below), whose sum is σ = 21544082568. Its totient is φ = 21321978240.

The previous prime is 21433030393. The next prime is 21433030439. The reversal of 21433030403 is 30403033412.

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 21433030403 - 2¹⁶ = 21432964867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433030103) 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, 55525793 + ... + 55526178.

It is an arithmetic number, because the mean of its divisors is an integer number (5386020642).

Almost surely, 2^21433030403 is an apocalyptic number.

21433030403 is a deficient number, since it is larger than the sum of its proper divisors (111052165).

21433030403 is a wasteful number, since it uses less digits than its factorization.

21433030403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111052164.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21433030403 its reverse (30403033412), we get a palindrome (51836063815).

The spelling of 21433030403 in words is "twenty-one billion, four hundred thirty-three million, thirty thousand, four hundred three".