20133122220 has 72 divisors (see below), whose sum is σ = 63725721696. Its totient is φ = 5135404032.

The previous prime is 20133122189. The next prime is 20133122221. The reversal of 20133122220 is 2222133102.

It is a super-2 number, since 2×20133122220² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 20133122193 and 20133122202.

It is not an unprimeable number, because it can be changed into a prime (20133122221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2427397 + ... + 2435676.

It is an arithmetic number, because the mean of its divisors is an integer number (885079468).

Almost surely, 2^20133122220 is an apocalyptic number.

20133122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20133122220 is an abundant number, since it is smaller than the sum of its proper divisors (43592599476).

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

20133122220 is a wasteful number, since it uses less digits than its factorization.

20133122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863111 (or 4863106 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20133122220 its reverse (2222133102), we get a palindrome (22355255322).

The spelling of 20133122220 in words is "twenty billion, one hundred thirty-three million, one hundred twenty-two thousand, two hundred twenty".