21302421344 has 12 divisors (see below), whose sum is σ = 41939142084. Its totient is φ = 10651210656.

The previous prime is 21302421341. The next prime is 21302421347. The reversal of 21302421344 is 44312420312.

It is an interprime number because it is at equal distance from previous prime (21302421341) and next prime (21302421347).

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 as a sum of consecutive naturals, namely, 332850302 + ... + 332850365.

It is an arithmetic number, because the mean of its divisors is an integer number (3494928507).

Almost surely, 2^21302421344 is an apocalyptic number.

It is an amenable number.

21302421344 is a deficient number, since it is larger than the sum of its proper divisors (20636720740).

21302421344 is an equidigital number, since it uses as much as digits as its factorization.

21302421344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665700677 (or 665700669 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21302421344 its reverse (44312420312), we get a palindrome (65614841656).

The spelling of 21302421344 in words is "twenty-one billion, three hundred two million, four hundred twenty-one thousand, three hundred forty-four".