21565089638214 has 32 divisors (see below), whose sum is σ = 44376769938816. Its totient is φ = 6982142825280.

The previous prime is 21565089638087. The next prime is 21565089638233. The reversal of 21565089638214 is 41283698056512.

It is a super-2 number, since 2×21565089638214² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193034392 + ... + 193146075.

It is an arithmetic number, because the mean of its divisors is an integer number (1386774060588).

Almost surely, 2^{21565089638214} is an apocalyptic number.

21565089638214 is an abundant number, since it is smaller than the sum of its proper divisors (22811680300602).

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

21565089638214 is a wasteful number, since it uses less digits than its factorization.

21565089638214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386180740.

The product of its (nonzero) digits is 24883200, while the sum is 60.

The spelling of 21565089638214 in words is "twenty-one trillion, five hundred sixty-five billion, eighty-nine million, six hundred thirty-eight thousand, two hundred fourteen".