20200001220 has 288 divisors, whose sum is σ = 71795662848. Its totient is φ = 4501299456.

The previous prime is 20200001207. The next prime is 20200001231. The reversal of 20200001220 is 2210000202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20548849 + ... + 20549831.

It is an arithmetic number, because the mean of its divisors is an integer number (249290496).

Almost surely, 2^20200001220 is an apocalyptic number.

20200001220 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 20200001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35897831424).

20200001220 is an abundant number, since it is smaller than the sum of its proper divisors (51595661628).

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

20200001220 is a wasteful number, since it uses less digits than its factorization.

20200001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20200001220 its reverse (2210000202), we get a palindrome (22410001422).

The spelling of 20200001220 in words is "twenty billion, two hundred million, one thousand, two hundred twenty".