20160384845991 has 32 divisors (see below), whose sum is σ = 29047152169728. Its totient is φ = 12364014700800.

The previous prime is 20160384845971. The next prime is 20160384845999. The reversal of 20160384845991 is 19954848306102.

It is not a de Polignac number, because 20160384845991 - 2²⁹ = 20159847975079 is a prime.

It is a super-2 number, since 2×20160384845991² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20160384845999) 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 31 ways as a sum of consecutive naturals, for example, 77107315 + ... + 77368331.

It is an arithmetic number, because the mean of its divisors is an integer number (907723505304).

Almost surely, 2^{20160384845991} is an apocalyptic number.

20160384845991 is a deficient number, since it is larger than the sum of its proper divisors (8886767323737).

20160384845991 is a wasteful number, since it uses less digits than its factorization.

20160384845991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267791.

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 20160384845991 in words is "twenty trillion, one hundred sixty billion, three hundred eighty-four million, eight hundred forty-five thousand, nine hundred ninety-one".