21304214323 has 16 divisors (see below), whose sum is σ = 24661002240. Its totient is φ = 18026116416.

The previous prime is 21304214311. The next prime is 21304214329. The reversal of 21304214323 is 32341240312.

It is not a de Polignac number, because 21304214323 - 2²¹ = 21302117171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21304214329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734686 + ... + 763132.

It is an arithmetic number, because the mean of its divisors is an integer number (1541312640).

Almost surely, 2^21304214323 is an apocalyptic number.

21304214323 is a deficient number, since it is larger than the sum of its proper divisors (3356787917).

21304214323 is a wasteful number, since it uses less digits than its factorization.

21304214323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29826.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21304214323 its reverse (32341240312), we get a palindrome (53645454635).

The spelling of 21304214323 in words is "twenty-one billion, three hundred four million, two hundred fourteen thousand, three hundred twenty-three".