21303323142 has 32 divisors (see below), whose sum is σ = 42912350208. Its totient is φ = 7050247776.

The previous prime is 21303323137. The next prime is 21303323213. The reversal of 21303323142 is 24132330312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979963 + ... + 1001465.

It is an arithmetic number, because the mean of its divisors is an integer number (1341010944).

Almost surely, 2^21303323142 is an apocalyptic number.

21303323142 is an abundant number, since it is smaller than the sum of its proper divisors (21609027066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21303323142 is a wasteful number, since it uses less digits than its factorization.

21303323142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22684.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21303323142 its reverse (24132330312), we get a palindrome (45435653454).

The spelling of 21303323142 in words is "twenty-one billion, three hundred three million, three hundred twenty-three thousand, one hundred forty-two".