20863121190912 has 3744 divisors, whose sum is σ = 90224978976000. Its totient is φ = 4695400120320.

The previous prime is 20863121190887. The next prime is 20863121190941. The reversal of 20863121190912 is 21909112136802.

20863121190912 is a `hidden beast` number, since 2 + 0 + 8 + 631 + 2 + 1 + 1 + 9 + 0 + 9 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (3744).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 191404781514 + ... + 191404781622.

Almost surely, 2^{20863121190912} is an apocalyptic number.

20863121190912 is a gapful number since it is divisible by the number (22) 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 20863121190912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45112489488000).

20863121190912 is an abundant number, since it is smaller than the sum of its proper divisors (69361857785088).

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

20863121190912 is a wasteful number, since it uses less digits than its factorization.

20863121190912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 20863121190912 in words is "twenty trillion, eight hundred sixty-three billion, one hundred twenty-one million, one hundred ninety thousand, nine hundred twelve".