21535650441 has 16 divisors (see below), whose sum is σ = 31914261120. Its totient is φ = 14352783120.

The previous prime is 21535650413. The next prime is 21535650449. The reversal of 21535650441 is 14405653512.

21535650441 is a `hidden beast` number, since 2 + 1 + 53 + 565 + 0 + 4 + 41 = 666.

It is not a de Polignac number, because 21535650441 - 2⁷ = 21535650313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21535650396 and 21535650405.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27165 + ... + 209306.

It is an arithmetic number, because the mean of its divisors is an integer number (1994641320).

Almost surely, 2^21535650441 is an apocalyptic number.

It is an amenable number.

21535650441 is a deficient number, since it is larger than the sum of its proper divisors (10378610679).

21535650441 is a wasteful number, since it uses less digits than its factorization.

21535650441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239853 (or 239847 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 21535650441 in words is "twenty-one billion, five hundred thirty-five million, six hundred fifty thousand, four hundred forty-one".