20868103730644 has 12 divisors (see below), whose sum is σ = 36522145112544. Its totient is φ = 10433205127064.

The previous prime is 20868103730641. The next prime is 20868103730653. The reversal of 20868103730644 is 44603730186802.

It is a junction number, because it is equal to n+sod(n) for n = 20868103730591 and 20868103730600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20868103730641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211629112 + ... + 211727695.

It is an arithmetic number, because the mean of its divisors is an integer number (3043512092712).

Almost surely, 2^{20868103730644} is an apocalyptic number.

It is an amenable number.

20868103730644 is a deficient number, since it is larger than the sum of its proper divisors (15654041381900).

20868103730644 is a wasteful number, since it uses less digits than its factorization.

20868103730644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423369134 (or 423369132 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 20868103730644 in words is "twenty trillion, eight hundred sixty-eight billion, one hundred three million, seven hundred thirty thousand, six hundred forty-four".