21041324013 has 16 divisors (see below), whose sum is σ = 29087208000. Its totient is φ = 13513651200.

The previous prime is 21041324009. The next prime is 21041324023. The reversal of 21041324013 is 31042314012.

It is not a de Polignac number, because 21041324013 - 2² = 21041324009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041324023) 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, 230263 + ... + 308388.

It is an arithmetic number, because the mean of its divisors is an integer number (1817950500).

Almost surely, 2^21041324013 is an apocalyptic number.

It is an amenable number.

21041324013 is a deficient number, since it is larger than the sum of its proper divisors (8045883987).

21041324013 is a wasteful number, since it uses less digits than its factorization.

21041324013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539132.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21041324013 its reverse (31042314012), we get a palindrome (52083638025).

The spelling of 21041324013 in words is "twenty-one billion, forty-one million, three hundred twenty-four thousand, thirteen".