21441325503543 has 32 divisors (see below), whose sum is σ = 32627796268032. Its totient is φ = 12408057369600.

The previous prime is 21441325503539. The next prime is 21441325503551. The reversal of 21441325503543 is 34530552314412.

It is not a de Polignac number, because 21441325503543 - 2² = 21441325503539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21441325503495 and 21441325503504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441325502543) 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 31 ways as a sum of consecutive naturals, for example, 168524146 + ... + 168651327.

It is an arithmetic number, because the mean of its divisors is an integer number (1019618633376).

Almost surely, 2^{21441325503543} is an apocalyptic number.

21441325503543 is a deficient number, since it is larger than the sum of its proper divisors (11186470764489).

21441325503543 is a wasteful number, since it uses less digits than its factorization.

21441325503543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337175575.

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 21441325503543 its reverse (34530552314412), we get a palindrome (55971877817955).

The spelling of 21441325503543 in words is "twenty-one trillion, four hundred forty-one billion, three hundred twenty-five million, five hundred three thousand, five hundred forty-three".