21352305541 has 16 divisors (see below), whose sum is σ = 25921209600. Its totient is φ = 17169972480.

The previous prime is 21352305503. The next prime is 21352305587. The reversal of 21352305541 is 14550325312.

It is a cyclic number.

It is not a de Polignac number, because 21352305541 - 2¹⁷ = 21352174469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352305841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251466 + ... + 325483.

It is an arithmetic number, because the mean of its divisors is an integer number (1620075600).

Almost surely, 2^21352305541 is an apocalyptic number.

It is an amenable number.

21352305541 is a deficient number, since it is larger than the sum of its proper divisors (4568904059).

21352305541 is a wasteful number, since it uses less digits than its factorization.

21352305541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577284.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 21352305541 in words is "twenty-one billion, three hundred fifty-two million, three hundred five thousand, five hundred forty-one".