21344302432 has 24 divisors (see below), whose sum is σ = 42027400800. Its totient is φ = 10670676864.

The previous prime is 21344302429. The next prime is 21344302439. The reversal of 21344302432 is 23420344312.

It is a super-2 number, since 2×21344302432² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21344302432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344302439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211294 + ... + 295522.

It is an arithmetic number, because the mean of its divisors is an integer number (1751141700).

Almost surely, 2^21344302432 is an apocalyptic number.

It is an amenable number.

21344302432 is a deficient number, since it is larger than the sum of its proper divisors (20683098368).

21344302432 is an equidigital number, since it uses as much as digits as its factorization.

21344302432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92158 (or 92150 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21344302432 its reverse (23420344312), we get a palindrome (44764646744).

The spelling of 21344302432 in words is "twenty-one billion, three hundred forty-four million, three hundred two thousand, four hundred thirty-two".