20344315444521 has 16 divisors (see below), whose sum is σ = 28914147504000. Its totient is φ = 12679389118208.

The previous prime is 20344315444517. The next prime is 20344315444543. The reversal of 20344315444521 is 12544451344302.

It is a cyclic number.

It is not a de Polignac number, because 20344315444521 - 2² = 20344315444517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20344315444021) 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, 1338610341 + ... + 1338625538.

It is an arithmetic number, because the mean of its divisors is an integer number (1807134219000).

Almost surely, 2^{20344315444521} is an apocalyptic number.

It is an amenable number.

20344315444521 is a deficient number, since it is larger than the sum of its proper divisors (8569832059479).

20344315444521 is a wasteful number, since it uses less digits than its factorization.

20344315444521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677236048.

The product of its (nonzero) digits is 921600, while the sum is 42.

Adding to 20344315444521 its reverse (12544451344302), we get a palindrome (32888766788823).

The spelling of 20344315444521 in words is "twenty trillion, three hundred forty-four billion, three hundred fifteen million, four hundred forty-four thousand, five hundred twenty-one".