21338384352 has 48 divisors (see below), whose sum is σ = 56095441920. Its totient is φ = 7102358912.

The previous prime is 21338384339. The next prime is 21338384369. The reversal of 21338384352 is 25348383312.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

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, 97152 + ... + 228287.

It is an arithmetic number, because the mean of its divisors is an integer number (1168655040).

Almost surely, 2^21338384352 is an apocalyptic number.

It is an amenable number.

21338384352 is an abundant number, since it is smaller than the sum of its proper divisors (34757057568).

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

21338384352 is a wasteful number, since it uses less digits than its factorization.

21338384352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326135 (or 326127 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The spelling of 21338384352 in words is "twenty-one billion, three hundred thirty-eight million, three hundred eighty-four thousand, three hundred fifty-two".