21411034423 has 4 divisors (see below), whose sum is σ = 21416487840. Its totient is φ = 21405581008.

The previous prime is 21411034417. The next prime is 21411034427. The reversal of 21411034423 is 32443011412.

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 21411034423 - 2²⁹ = 20874163511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411034427) 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, 2720815 + ... + 2728672.

It is an arithmetic number, because the mean of its divisors is an integer number (5354121960).

Almost surely, 2^21411034423 is an apocalyptic number.

21411034423 is a deficient number, since it is larger than the sum of its proper divisors (5453417).

21411034423 is an equidigital number, since it uses as much as digits as its factorization.

21411034423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5453416.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21411034423 its reverse (32443011412), we get a palindrome (53854045835).

The spelling of 21411034423 in words is "twenty-one billion, four hundred eleven million, thirty-four thousand, four hundred twenty-three".