21044301423 has 32 divisors (see below), whose sum is σ = 29547804672. Its totient is φ = 13304054400.

The previous prime is 21044301419. The next prime is 21044301431. The reversal of 21044301423 is 32410344012.

It is not a de Polignac number, because 21044301423 - 2² = 21044301419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21044301393 and 21044301402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044301413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4783861 + ... + 4788257.

It is an arithmetic number, because the mean of its divisors is an integer number (923368896).

Almost surely, 2^21044301423 is an apocalyptic number.

21044301423 is a deficient number, since it is larger than the sum of its proper divisors (8503503249).

21044301423 is a wasteful number, since it uses less digits than its factorization.

21044301423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21044301423 its reverse (32410344012), we get a palindrome (53454645435).

The spelling of 21044301423 in words is "twenty-one billion, forty-four million, three hundred one thousand, four hundred twenty-three".