21352103543 has 2 divisors, whose sum is σ = 21352103544. Its totient is φ = 21352103542.

The previous prime is 21352103527. The next prime is 21352103551. The reversal of 21352103543 is 34530125312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21352103543 - 2⁴ = 21352103527 is a prime.

It is a super-3 number, since 3×21352103543³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21352103503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676051771 + 10676051772.

It is an arithmetic number, because the mean of its divisors is an integer number (10676051772).

Almost surely, 2^21352103543 is an apocalyptic number.

21352103543 is a deficient number, since it is larger than the sum of its proper divisors (1).

21352103543 is an equidigital number, since it uses as much as digits as its factorization.

21352103543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 21352103543 its reverse (34530125312), we get a palindrome (55882228855).

The spelling of 21352103543 in words is "twenty-one billion, three hundred fifty-two million, one hundred three thousand, five hundred forty-three".