20004356657571 has 32 divisors (see below), whose sum is σ = 31335969547008. Its totient is φ = 11191079264640.

The previous prime is 20004356657531. The next prime is 20004356657573. The reversal of 20004356657571 is 17575665340002.

It is not a de Polignac number, because 20004356657571 - 2⁹ = 20004356657059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20004356657573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31377640 + ... + 32008826.

It is an arithmetic number, because the mean of its divisors is an integer number (979249048344).

Almost surely, 2^{20004356657571} is an apocalyptic number.

20004356657571 is a deficient number, since it is larger than the sum of its proper divisors (11331612889437).

20004356657571 is a wasteful number, since it uses less digits than its factorization.

20004356657571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705091.

The product of its (nonzero) digits is 5292000, while the sum is 51.

The spelling of 20004356657571 in words is "twenty trillion, four billion, three hundred fifty-six million, six hundred fifty-seven thousand, five hundred seventy-one".