21302421342 has 64 divisors (see below), whose sum is σ = 44766658560. Its totient is φ = 6749049600.

The previous prime is 21302421341. The next prime is 21302421347. The reversal of 21302421342 is 24312420312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302421341) 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, 12808803 + ... + 12810465.

It is an arithmetic number, because the mean of its divisors is an integer number (699479040).

Almost surely, 2^21302421342 is an apocalyptic number.

21302421342 is an abundant number, since it is smaller than the sum of its proper divisors (23464237218).

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

21302421342 is a wasteful number, since it uses less digits than its factorization.

21302421342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889.

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

Adding to 21302421342 its reverse (24312420312), we get a palindrome (45614841654).

The spelling of 21302421342 in words is "twenty-one billion, three hundred two million, four hundred twenty-one thousand, three hundred forty-two".