20512104402055 has 32 divisors (see below), whose sum is σ = 28587354887808. Its totient is φ = 13838169600000.

The previous prime is 20512104402037. The next prime is 20512104402059. The reversal of 20512104402055 is 55020440121502.

It is not a de Polignac number, because 20512104402055 - 2⁷ = 20512104401927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512104402059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8985696 + ... + 11034805.

It is an arithmetic number, because the mean of its divisors is an integer number (893354840244).

Almost surely, 2^{20512104402055} is an apocalyptic number.

20512104402055 is a deficient number, since it is larger than the sum of its proper divisors (8075250485753).

20512104402055 is a wasteful number, since it uses less digits than its factorization.

20512104402055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020987.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 20512104402055 its reverse (55020440121502), we get a palindrome (75532544523557).

The spelling of 20512104402055 in words is "twenty trillion, five hundred twelve billion, one hundred four million, four hundred two thousand, fifty-five".