20555552145104 has 20 divisors (see below), whose sum is σ = 39849823406400. Its totient is φ = 10271726749920.

The previous prime is 20555552145103. The next prime is 20555552145131. The reversal of 20555552145104 is 40154125555502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555552145103) 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 3 ways as a sum of consecutive naturals, for example, 378054632 + ... + 378108999.

It is an arithmetic number, because the mean of its divisors is an integer number (1992491170320).

Almost surely, 2^{20555552145104} is an apocalyptic number.

It is an amenable number.

20555552145104 is a deficient number, since it is larger than the sum of its proper divisors (19294271261296).

20555552145104 is a wasteful number, since it uses less digits than its factorization.

20555552145104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756165338 (or 756165332 counting only the distinct ones).

The product of its (nonzero) digits is 1000000, while the sum is 44.

The spelling of 20555552145104 in words is "twenty trillion, five hundred fifty-five billion, five hundred fifty-two million, one hundred forty-five thousand, one hundred four".