21423424683344 has 40 divisors (see below), whose sum is σ = 41633598154920. Its totient is φ = 10679309641728.

The previous prime is 21423424683343. The next prime is 21423424683413. The reversal of 21423424683344 is 44338642432412.

It can be written as a sum of positive squares in 4 ways, for example, as 12352413160000 + 9071011523344 = 3514600^2 + 3011812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21423424683292 and 21423424683301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21423424683343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7495262 + ... + 9951170.

It is an arithmetic number, because the mean of its divisors is an integer number (1040839953873).

Almost surely, 2^{21423424683344} is an apocalyptic number.

It is an amenable number.

21423424683344 is a deficient number, since it is larger than the sum of its proper divisors (20210173471576).

21423424683344 is a wasteful number, since it uses less digits than its factorization.

21423424683344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457567 (or 2457561 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 50.

The spelling of 21423424683344 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, six hundred eighty-three thousand, three hundred forty-four".