21337506885256 has 32 divisors (see below), whose sum is σ = 40535043120000. Its totient is φ = 10528300650816.

The previous prime is 21337506885193. The next prime is 21337506885271. The reversal of 21337506885256 is 65258860573312.

It is a junction number, because it is equal to n+sod(n) for n = 21337506885194 and 21337506885203.

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 7 ways as a sum of consecutive naturals, for example, 7429566 + ... + 9893101.

It is an arithmetic number, because the mean of its divisors is an integer number (1266720097500).

Almost surely, 2^{21337506885256} is an apocalyptic number.

It is an amenable number.

21337506885256 is a deficient number, since it is larger than the sum of its proper divisors (19197536234744).

21337506885256 is a wasteful number, since it uses less digits than its factorization.

21337506885256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17324701 (or 17324697 counting only the distinct ones).

The product of its (nonzero) digits is 72576000, while the sum is 61.

The spelling of 21337506885256 in words is "twenty-one trillion, three hundred thirty-seven billion, five hundred six million, eight hundred eighty-five thousand, two hundred fifty-six".