21240524300541 has 64 divisors (see below), whose sum is σ = 35002575691776. Its totient is φ = 11156777280000.

The previous prime is 21240524300539. The next prime is 21240524300551. The reversal of 21240524300541 is 14500342504212.

It is not a de Polignac number, because 21240524300541 - 2¹ = 21240524300539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21240524300531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 348134860 + ... + 348195866.

It is an arithmetic number, because the mean of its divisors is an integer number (546915245184).

Almost surely, 2^{21240524300541} is an apocalyptic number.

21240524300541 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21240524300541 is a deficient number, since it is larger than the sum of its proper divisors (13762051391235).

21240524300541 is a wasteful number, since it uses less digits than its factorization.

21240524300541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66362.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 21240524300541 its reverse (14500342504212), we get a palindrome (35740866804753).

The spelling of 21240524300541 in words is "twenty-one trillion, two hundred forty billion, five hundred twenty-four million, three hundred thousand, five hundred forty-one".