20004357210505 has 32 divisors (see below), whose sum is σ = 24890507690400. Its totient is φ = 15426222569472.

The previous prime is 20004357210443. The next prime is 20004357210527. The reversal of 20004357210505 is 50501275340002.

It can be written as a sum of positive squares in 16 ways, for example, as 4448779479369 + 15555577731136 = 2109213^2 + 3944056^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004357210505 - 2³⁷ = 19866918257033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1001631 + ... + 6404059.

It is an arithmetic number, because the mean of its divisors is an integer number (777828365325).

Almost surely, 2^{20004357210505} is an apocalyptic number.

It is an amenable number.

20004357210505 is a deficient number, since it is larger than the sum of its proper divisors (4886150479895).

20004357210505 is a wasteful number, since it uses less digits than its factorization.

20004357210505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5402733.

The product of its (nonzero) digits is 42000, while the sum is 34.

The spelling of 20004357210505 in words is "twenty trillion, four billion, three hundred fifty-seven million, two hundred ten thousand, five hundred five".