20112011543664 has 80 divisors (see below), whose sum is σ = 57748811577600. Its totient is φ = 6701694093504.

The previous prime is 20112011543651. The next prime is 20112011543711. The reversal of 20112011543664 is 46634511021102.

20112011543664 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 201 + 15 + 436 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 6764434 + ... + 9272625.

It is an arithmetic number, because the mean of its divisors is an integer number (721860144720).

Almost surely, 2^{20112011543664} is an apocalyptic number.

20112011543664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20112011543664 is an abundant number, since it is smaller than the sum of its proper divisors (37636800033936).

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

20112011543664 is a wasteful number, since it uses less digits than its factorization.

20112011543664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16039979 (or 16039967 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 20112011543664 its reverse (46634511021102), we get a palindrome (66746522564766).

The spelling of 20112011543664 in words is "twenty trillion, one hundred twelve billion, eleven million, five hundred forty-three thousand, six hundred sixty-four".