20021131332000 has 288 divisors, whose sum is σ = 71097082986384. Its totient is φ = 5335805952000.

The previous prime is 20021131331933. The next prime is 20021131332017. The reversal of 20021131332000 is 23313112002.

20021131332000 is a `hidden beast` number, since 20 + 0 + 2 + 11 + 313 + 320 + 0 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 291224281104 + 19729907050896 = 539652^2 + 4441836^2 .

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 47 ways as a sum of consecutive naturals, for example, 60928140 + ... + 61255860.

Almost surely, 2^{20021131332000} is an apocalyptic number.

20021131332000 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 20021131332000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35548541493192).

20021131332000 is an abundant number, since it is smaller than the sum of its proper divisors (51075951654384).

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

20021131332000 is a wasteful number, since it uses less digits than its factorization.

20021131332000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329449 (or 329428 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20021131332000 its reverse (23313112002), we get a palindrome (20044444444002).

The spelling of 20021131332000 in words is "twenty trillion, twenty-one billion, one hundred thirty-one million, three hundred thirty-two thousand".