20363613445665 has 32 divisors (see below), whose sum is σ = 41373690812160. Its totient is φ = 9309080431872.

The previous prime is 20363613445649. The next prime is 20363613445727. The reversal of 20363613445665 is 56654431636302.

20363613445665 is a `hidden beast` number, since 2 + 0 + 3 + 6 + 36 + 1 + 3 + 44 + 566 + 5 = 666.

It is not a de Polignac number, because 20363613445665 - 2⁴ = 20363613445649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10774397704 + ... + 10774399593.

It is an arithmetic number, because the mean of its divisors is an integer number (1292927837880).

Almost surely, 2^{20363613445665} is an apocalyptic number.

It is an amenable number.

20363613445665 is an abundant number, since it is smaller than the sum of its proper divisors (21010077366495).

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

20363613445665 is a wasteful number, since it uses less digits than its factorization.

20363613445665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21548797318 (or 21548797312 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 54.

The spelling of 20363613445665 in words is "twenty trillion, three hundred sixty-three billion, six hundred thirteen million, four hundred forty-five thousand, six hundred sixty-five".