20720501020011 has 32 divisors (see below), whose sum is σ = 29778344563968. Its totient is φ = 12740009443200.

The previous prime is 20720501019989. The next prime is 20720501020013. The reversal of 20720501020011 is 11002010502702.

It is not a de Polignac number, because 20720501020011 - 2¹¹ = 20720501017963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20720501020011.

It is not an unprimeable number, because it can be changed into a prime (20720501020013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 928867720 + ... + 928890026.

It is an arithmetic number, because the mean of its divisors is an integer number (930573267624).

Almost surely, 2^{20720501020011} is an apocalyptic number.

20720501020011 is a deficient number, since it is larger than the sum of its proper divisors (9057843543957).

20720501020011 is a wasteful number, since it uses less digits than its factorization.

20720501020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41931.

The product of its (nonzero) digits is 280, while the sum is 21.

Adding to 20720501020011 its reverse (11002010502702), we get a palindrome (31722511522713).

The spelling of 20720501020011 in words is "twenty trillion, seven hundred twenty billion, five hundred one million, twenty thousand, eleven".