20133011220 has 144 divisors (see below), whose sum is σ = 65630839680. Its totient is φ = 4597990656.

The previous prime is 20133011219. The next prime is 20133011231. The reversal of 20133011220 is 2211033102.

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 20133011220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5022457 + ... + 5026463.

It is an arithmetic number, because the mean of its divisors is an integer number (455769720).

Almost surely, 2^20133011220 is an apocalyptic number.

20133011220 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 20133011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32815419840).

20133011220 is an abundant number, since it is smaller than the sum of its proper divisors (45497828460).

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

20133011220 is a wasteful number, since it uses less digits than its factorization.

20133011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742 (or 5733 counting only the distinct ones).

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

Adding to 20133011220 its reverse (2211033102), we get a palindrome (22344044322).

The spelling of 20133011220 in words is "twenty billion, one hundred thirty-three million, eleven thousand, two hundred twenty".