21441311540013 has 16 divisors (see below), whose sum is σ = 28863234247680. Its totient is φ = 14156868980016.

The previous prime is 21441311539993. The next prime is 21441311540021. The reversal of 21441311540013 is 31004511314412.

It is a happy number.

It is not a de Polignac number, because 21441311540013 - 2²⁶ = 21441244431149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441311560013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7624645 + ... + 10050762.

It is an arithmetic number, because the mean of its divisors is an integer number (1803952140480).

Almost surely, 2^{21441311540013} is an apocalyptic number.

It is an amenable number.

21441311540013 is a deficient number, since it is larger than the sum of its proper divisors (7421922707667).

21441311540013 is a wasteful number, since it uses less digits than its factorization.

21441311540013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17679296.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21441311540013 its reverse (31004511314412), we get a palindrome (52445822854425).

The spelling of 21441311540013 in words is "twenty-one trillion, four hundred forty-one billion, three hundred eleven million, five hundred forty thousand, thirteen".