20644664246044 has 12 divisors (see below), whose sum is σ = 36131271380568. Its totient is φ = 10321443851600.

The previous prime is 20644664246039. The next prime is 20644664246051. The reversal of 20644664246044 is 44064246644602.

It is a junction number, because it is equal to n+sod(n) for n = 20644664245982 and 20644664246000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222015562 + ... + 222108529.

It is an arithmetic number, because the mean of its divisors is an integer number (3010939281714).

Almost surely, 2^{20644664246044} is an apocalyptic number.

It is an amenable number.

20644664246044 is a deficient number, since it is larger than the sum of its proper divisors (15486607134524).

20644664246044 is a wasteful number, since it uses less digits than its factorization.

20644664246044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444135716 (or 444135714 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 52.

The spelling of 20644664246044 in words is "twenty trillion, six hundred forty-four billion, six hundred sixty-four million, two hundred forty-six thousand, forty-four".