20313351442521 has 16 divisors (see below), whose sum is σ = 30093930720000. Its totient is φ = 13542199766064.

The previous prime is 20313351442513. The next prime is 20313351442597. The reversal of 20313351442521 is 12524415331302.

20313351442521 is a `hidden beast` number, since 2 + 0 + 3 + 13 + 351 + 44 + 252 + 1 = 666.

It is not a de Polignac number, because 20313351442521 - 2³ = 20313351442513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20313351442511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14158960 + ... + 15527486.

It is an arithmetic number, because the mean of its divisors is an integer number (1880870670000).

Almost surely, 2^{20313351442521} is an apocalyptic number.

It is an amenable number.

20313351442521 is a deficient number, since it is larger than the sum of its proper divisors (9780579277479).

20313351442521 is a wasteful number, since it uses less digits than its factorization.

20313351442521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918285 (or 1918279 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 20313351442521 its reverse (12524415331302), we get a palindrome (32837766773823).

The spelling of 20313351442521 in words is "twenty trillion, three hundred thirteen billion, three hundred fifty-one million, four hundred forty-two thousand, five hundred twenty-one".