20883566912 has 56 divisors (see below), whose sum is σ = 44735340552. Its totient is φ = 9615513600.

The previous prime is 20883566911. The next prime is 20883566923. The reversal of 20883566912 is 21966538802.

It can be written as a sum of positive squares in 4 ways, for example, as 13719616 + 20869847296 = 3704^2 + 144464^2 .

It is a super-2 number, since 2×20883566912² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20883566911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320462 + ... + 380082.

It is an arithmetic number, because the mean of its divisors is an integer number (798845367).

Almost surely, 2^20883566912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20883566912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22367670276).

20883566912 is an abundant number, since it is smaller than the sum of its proper divisors (23851773640).

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

20883566912 is a wasteful number, since it uses less digits than its factorization.

20883566912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60067 (or 60057 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 20883566912 in words is "twenty billion, eight hundred eighty-three million, five hundred sixty-six thousand, nine hundred twelve".