20313313606644 has 24 divisors (see below), whose sum is σ = 47401219564608. Its totient is φ = 6770606276160.

The previous prime is 20313313606639. The next prime is 20313313606661. The reversal of 20313313606644 is 44660631331302.

It is a junction number, because it is equal to n+sod(n) for n = 20313313606596 and 20313313606605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62112537 + ... + 62438720.

It is an arithmetic number, because the mean of its divisors is an integer number (1975050815192).

Almost surely, 2^{20313313606644} is an apocalyptic number.

It is an amenable number.

20313313606644 is an abundant number, since it is smaller than the sum of its proper divisors (27087905957964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20313313606644 is a wasteful number, since it uses less digits than its factorization.

20313313606644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124564855 (or 124564853 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 42.

Adding to 20313313606644 its reverse (44660631331302), we get a palindrome (64973944937946).

The spelling of 20313313606644 in words is "twenty trillion, three hundred thirteen billion, three hundred thirteen million, six hundred six thousand, six hundred forty-four".