21320240344344 has 64 divisors (see below), whose sum is σ = 59888315628000. Its totient is φ = 7026895687680.

The previous prime is 21320240344331. The next prime is 21320240344367. The reversal of 21320240344344 is 44344304202312.

21320240344344 is a `hidden beast` number, since 2 + 1 + 3 + 202 + 4 + 0 + 3 + 443 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 21320240344299 and 21320240344308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554502217 + ... + 554540664.

Almost surely, 2^{21320240344344} is an apocalyptic number.

21320240344344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21320240344344 is an abundant number, since it is smaller than the sum of its proper divisors (38568075283656).

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

21320240344344 is a wasteful number, since it uses less digits than its factorization.

21320240344344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109042985 (or 1109042975 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 21320240344344 its reverse (44344304202312), we get a palindrome (65664544546656).

The spelling of 21320240344344 in words is "twenty-one trillion, three hundred twenty billion, two hundred forty million, three hundred forty-four thousand, three hundred forty-four".