21636213165350 has 48 divisors (see below), whose sum is σ = 45992913952608. Its totient is φ = 7418048528640.

The previous prime is 21636213165209. The next prime is 21636213165379. The reversal of 21636213165350 is 5356131263612.

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 23 ways as a sum of consecutive naturals, for example, 37477484 + ... + 38050416.

It is an arithmetic number, because the mean of its divisors is an integer number (958185707346).

Almost surely, 2^{21636213165350} is an apocalyptic number.

21636213165350 is an abundant number, since it is smaller than the sum of its proper divisors (24356700787258).

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

21636213165350 is a wasteful number, since it uses less digits than its factorization.

21636213165350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680849 (or 680844 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 21636213165350 in words is "twenty-one trillion, six hundred thirty-six billion, two hundred thirteen million, one hundred sixty-five thousand, three hundred fifty".