21653235213536 has 12 divisors (see below), whose sum is σ = 42629806826712. Its totient is φ = 10826617606752.

The previous prime is 21653235213473. The next prime is 21653235213551. The reversal of 21653235213536 is 63531253235612.

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 as a sum of consecutive naturals, namely, 338331800180 + ... + 338331800243.

It is an arithmetic number, because the mean of its divisors is an integer number (3552483902226).

Almost surely, 2^{21653235213536} is an apocalyptic number.

It is an amenable number.

21653235213536 is a deficient number, since it is larger than the sum of its proper divisors (20976571613176).

21653235213536 is an equidigital number, since it uses as much as digits as its factorization.

21653235213536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676663600433 (or 676663600425 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 47.

The spelling of 21653235213536 in words is "twenty-one trillion, six hundred fifty-three billion, two hundred thirty-five million, two hundred thirteen thousand, five hundred thirty-six".