21532353544353 has 8 divisors (see below), whose sum is σ = 28709860136608. Its totient is φ = 14354874657504.

The previous prime is 21532353544349. The next prime is 21532353544369. The reversal of 21532353544353 is 35344535323512.

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

It is not a de Polignac number, because 21532353544353 - 2² = 21532353544349 is a prime.

It is a super-2 number, since 2×21532353544353² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21532353584353) 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 7 ways as a sum of consecutive naturals, for example, 5039476 + ... + 8274117.

It is an arithmetic number, because the mean of its divisors is an integer number (3588732517076).

Almost surely, 2^{21532353544353} is an apocalyptic number.

It is an amenable number.

21532353544353 is a deficient number, since it is larger than the sum of its proper divisors (7177506592255).

21532353544353 is a wasteful number, since it uses less digits than its factorization.

21532353544353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13852703.

The product of its digits is 9720000, while the sum is 48.

Adding to 21532353544353 its reverse (35344535323512), we get a palindrome (56876888867865).

The spelling of 21532353544353 in words is "twenty-one trillion, five hundred thirty-two billion, three hundred fifty-three million, five hundred forty-four thousand, three hundred fifty-three".