20351645106244 has 12 divisors (see below), whose sum is σ = 35618938052544. Its totient is φ = 10174805662664.

The previous prime is 20351645106241. The next prime is 20351645106283. The reversal of 20351645106244 is 44260154615302.

It is a self number, because there is not a number n which added to its sum of digits gives 20351645106244.

It is not an unprimeable number, because it can be changed into a prime (20351645106241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254177584 + ... + 254257639.

It is an arithmetic number, because the mean of its divisors is an integer number (2968244837712).

Almost surely, 2^{20351645106244} is an apocalyptic number.

It is an amenable number.

20351645106244 is a deficient number, since it is larger than the sum of its proper divisors (15267292946300).

20351645106244 is a wasteful number, since it uses less digits than its factorization.

20351645106244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508445234 (or 508445232 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 20351645106244 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-five million, one hundred six thousand, two hundred forty-four".