20992111042560 has 896 divisors, whose sum is σ = 80007337267200. Its totient is φ = 4695664361472.

The previous prime is 20992111042549. The next prime is 20992111042561. The reversal of 20992111042560 is 6524011129902.

It is a tau number, because it is divible by the number of its divisors (896).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992111042561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1980943182 + ... + 1980953778.

It is an arithmetic number, because the mean of its divisors is an integer number (89293903200).

Almost surely, 2^{20992111042560} is an apocalyptic number.

20992111042560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20992111042560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40003668633600).

20992111042560 is an abundant number, since it is smaller than the sum of its proper divisors (59015226224640).

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

20992111042560 is an equidigital number, since it uses as much as digits as its factorization.

20992111042560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10699 (or 10661 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 20992111042560 in words is "twenty trillion, nine hundred ninety-two billion, one hundred eleven million, forty-two thousand, five hundred sixty".