21404030223 has 8 divisors (see below), whose sum is σ = 28686576688. Its totient is φ = 14195418624.

The previous prime is 21404030209. The next prime is 21404030237. The reversal of 21404030223 is 32203040412.

It is an interprime number because it is at equal distance from previous prime (21404030209) and next prime (21404030237).

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

It is not a de Polignac number, because 21404030223 - 2²⁰ = 21402981647 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 21404030223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404030243) 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, 18483040 + ... + 18484197.

It is an arithmetic number, because the mean of its divisors is an integer number (3585822086).

Almost surely, 2^21404030223 is an apocalyptic number.

21404030223 is a deficient number, since it is larger than the sum of its proper divisors (7282546465).

21404030223 is a wasteful number, since it uses less digits than its factorization.

21404030223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36967433.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21404030223 its reverse (32203040412), we get a palindrome (53607070635).

The spelling of 21404030223 in words is "twenty-one billion, four hundred four million, thirty thousand, two hundred twenty-three".