21313402441 has 16 divisors (see below), whose sum is σ = 22418329600. Its totient is φ = 20237506560.

The previous prime is 21313402307. The next prime is 21313402447. The reversal of 21313402441 is 14420431312.

It is a cyclic number.

It is not a de Polignac number, because 21313402441 - 2²¹ = 21311305289 is a prime.

It is a super-2 number, since 2×21313402441² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313402447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412360 + ... + 461158.

It is an arithmetic number, because the mean of its divisors is an integer number (1401145600).

Almost surely, 2^21313402441 is an apocalyptic number.

It is an amenable number.

21313402441 is a deficient number, since it is larger than the sum of its proper divisors (1104927159).

21313402441 is a wasteful number, since it uses less digits than its factorization.

21313402441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49096.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21313402441 its reverse (14420431312), we get a palindrome (35733833753).

The spelling of 21313402441 in words is "twenty-one billion, three hundred thirteen million, four hundred two thousand, four hundred forty-one".