20561117607036 has 36 divisors (see below), whose sum is σ = 51983381329152. Its totient is φ = 6852460353984.

The previous prime is 20561117607011. The next prime is 20561117607059. The reversal of 20561117607036 is 63070671116502.

20561117607036 is a `hidden beast` number, since 2 + 0 + 5 + 6 + 1 + 1 + 1 + 7 + 607 + 0 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 20561117606982 and 20561117607000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51695601 + ... + 52091816.

Almost surely, 2^{20561117607036} is an apocalyptic number.

It is an amenable number.

20561117607036 is an abundant number, since it is smaller than the sum of its proper divisors (31422263722116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20561117607036 is a wasteful number, since it uses less digits than its factorization.

20561117607036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103792930 (or 103792925 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 20561117607036 in words is "twenty trillion, five hundred sixty-one billion, one hundred seventeen million, six hundred seven thousand, thirty-six".