20501210206144 has 28 divisors (see below), whose sum is σ = 41289284369704. Its totient is φ = 10097610994944.

The previous prime is 20501210206121. The next prime is 20501210206171. The reversal of 20501210206144 is 44160201210502.

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, 2390528619 + ... + 2390537194.

It is an arithmetic number, because the mean of its divisors is an integer number (1474617298918).

Almost surely, 2^{20501210206144} is an apocalyptic number.

It is an amenable number.

20501210206144 is an abundant number, since it is smaller than the sum of its proper divisors (20788074163560).

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

20501210206144 is an equidigital number, since it uses as much as digits as its factorization.

20501210206144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781065892 (or 4781065882 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 20501210206144 its reverse (44160201210502), we get a palindrome (64661411416646).

The spelling of 20501210206144 in words is "twenty trillion, five hundred one billion, two hundred ten million, two hundred six thousand, one hundred forty-four".