20013101220 has 192 divisors, whose sum is σ = 65976648192. Its totient is φ = 4437504000.

The previous prime is 20013101219. The next prime is 20013101257. The reversal of 20013101220 is 2210131002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20013101196 and 20013101205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3113610 + ... + 3120030.

It is an arithmetic number, because the mean of its divisors is an integer number (343628376).

Almost surely, 2^20013101220 is an apocalyptic number.

20013101220 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 20013101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32988324096).

20013101220 is an abundant number, since it is smaller than the sum of its proper divisors (45963546972).

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

20013101220 is a wasteful number, since it uses less digits than its factorization.

20013101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6662 (or 6660 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20013101220 its reverse (2210131002), we get a palindrome (22223232222).

The spelling of 20013101220 in words is "twenty billion, thirteen million, one hundred one thousand, two hundred twenty".