21613510334272 has 28 divisors (see below), whose sum is σ = 45146641654720. Its totient is φ = 10237978578816.

The previous prime is 21613510334267. The next prime is 21613510334303. The reversal of 21613510334272 is 27243301531612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8887132968 + ... + 8887135399.

Almost surely, 2^{21613510334272} is an apocalyptic number.

It is an amenable number.

21613510334272 is an abundant number, since it is smaller than the sum of its proper divisors (23533131320448).

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

21613510334272 is a wasteful number, since it uses less digits than its factorization.

21613510334272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17774268398 (or 17774268388 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

Adding to 21613510334272 its reverse (27243301531612), we get a palindrome (48856811865884).

The spelling of 21613510334272 in words is "twenty-one trillion, six hundred thirteen billion, five hundred ten million, three hundred thirty-four thousand, two hundred seventy-two".