20512026642055 has 16 divisors (see below), whose sum is σ = 26508730993920. Its totient is φ = 15146839219968.

The previous prime is 20512026641999. The next prime is 20512026642059. The reversal of 20512026642055 is 55024662021502.

It is a cyclic number.

It is not a de Polignac number, because 20512026642055 - 2²⁷ = 20511892424327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20512026641999 and 20512026642017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512026642059) 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 15 ways as a sum of consecutive naturals, for example, 3269047 + ... + 7191016.

It is an arithmetic number, because the mean of its divisors is an integer number (1656795687120).

Almost surely, 2^{20512026642055} is an apocalyptic number.

20512026642055 is a deficient number, since it is larger than the sum of its proper divisors (5996704351865).

20512026642055 is a wasteful number, since it uses less digits than its factorization.

20512026642055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10490250.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 20512026642055 its reverse (55024662021502), we get a palindrome (75536688663557).

The spelling of 20512026642055 in words is "twenty trillion, five hundred twelve billion, twenty-six million, six hundred forty-two thousand, fifty-five".