20021133120 has 224 divisors, whose sum is σ = 65392621056. Its totient is φ = 5186764800.

The previous prime is 20021133109. The next prime is 20021133191. The reversal of 20021133120 is 2133112002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20021133120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10665622 + ... + 10667498.

It is an arithmetic number, because the mean of its divisors is an integer number (291931344).

Almost surely, 2^20021133120 is an apocalyptic number.

20021133120 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 20021133120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32696310528).

20021133120 is an abundant number, since it is smaller than the sum of its proper divisors (45371487936).

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

20021133120 is a wasteful number, since it uses less digits than its factorization.

20021133120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209 (or 2199 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20021133120 its reverse (2133112002), we get a palindrome (22154245122).

The spelling of 20021133120 in words is "twenty billion, twenty-one million, one hundred thirty-three thousand, one hundred twenty".