21535650443 has 8 divisors (see below), whose sum is σ = 21718897200. Its totient is φ = 21352808448.

The previous prime is 21535650413. The next prime is 21535650449. The reversal of 21535650443 is 34405653512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21535650443 - 2¹⁶ = 21535584907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21535650397 and 21535650406.

It is not an unprimeable number, because it can be changed into a prime (21535650449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6155 + ... + 207627.

It is an arithmetic number, because the mean of its divisors is an integer number (2714862150).

Almost surely, 2^21535650443 is an apocalyptic number.

21535650443 is a deficient number, since it is larger than the sum of its proper divisors (183246757).

21535650443 is a wasteful number, since it uses less digits than its factorization.

21535650443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202381.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 21535650443 in words is "twenty-one billion, five hundred thirty-five million, six hundred fifty thousand, four hundred forty-three".