21366433450344 has 32 divisors (see below), whose sum is σ = 53445384933120. Its totient is φ = 7118237642496.

The previous prime is 21366433450319. The next prime is 21366433450357. The reversal of 21366433450344 is 44305433466312.

It is a junction number, because it is equal to n+sod(n) for n = 21366433450293 and 21366433450302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244132897 + ... + 244220400.

It is an arithmetic number, because the mean of its divisors is an integer number (1670168279160).

Almost surely, 2^{21366433450344} is an apocalyptic number.

21366433450344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21366433450344 is an abundant number, since it is smaller than the sum of its proper divisors (32078951482776).

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

21366433450344 is a wasteful number, since it uses less digits than its factorization.

21366433450344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488355129 (or 488355125 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 48.

The spelling of 21366433450344 in words is "twenty-one trillion, three hundred sixty-six billion, four hundred thirty-three million, four hundred fifty thousand, three hundred forty-four".