21337216606838 has 16 divisors (see below), whose sum is σ = 36041750046720. Its totient is φ = 9385872407400.

The previous prime is 21337216606837. The next prime is 21337216606847. The reversal of 21337216606838 is 83860661273312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21337216606837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15643119998 + ... + 15643121361.

It is an arithmetic number, because the mean of its divisors is an integer number (2252609377920).

Almost surely, 2^{21337216606838} is an apocalyptic number.

21337216606838 is a deficient number, since it is larger than the sum of its proper divisors (14704533439882).

21337216606838 is a wasteful number, since it uses less digits than its factorization.

21337216606838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31286241403.

The product of its (nonzero) digits is 10450944, while the sum is 56.

The spelling of 21337216606838 in words is "twenty-one trillion, three hundred thirty-seven billion, two hundred sixteen million, six hundred six thousand, eight hundred thirty-eight".