20505577732004 has 24 divisors (see below), whose sum is σ = 36797857268256. Its totient is φ = 9992419304000.

The previous prime is 20505577732001. The next prime is 20505577732007. The reversal of 20505577732004 is 40023777550502.

It is an interprime number because it is at equal distance from previous prime (20505577732001) and next prime (20505577732007).

It is a self number, because there is not a number n which added to its sum of digits gives 20505577732004.

It is not an unprimeable number, because it can be changed into a prime (20505577732001) 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 7 ways as a sum of consecutive naturals, for example, 64224902 + ... + 64543389.

It is an arithmetic number, because the mean of its divisors is an integer number (1533244052844).

Almost surely, 2^{20505577732004} is an apocalyptic number.

It is an amenable number.

20505577732004 is a deficient number, since it is larger than the sum of its proper divisors (16292279536252).

20505577732004 is a wasteful number, since it uses less digits than its factorization.

20505577732004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128769307 (or 128769305 counting only the distinct ones).

The product of its (nonzero) digits is 2058000, while the sum is 47.

The spelling of 20505577732004 in words is "twenty trillion, five hundred five billion, five hundred seventy-seven million, seven hundred thirty-two thousand, four".