20202220020 has 192 divisors, whose sum is σ = 58427018496. Its totient is φ = 5214044160.

The previous prime is 20202220009. The next prime is 20202220057. The reversal of 20202220020 is 2002220202.

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 = 20202219978 and 20202220005.

It is a congruent number.

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, 78607732 + ... + 78607988.

It is an arithmetic number, because the mean of its divisors is an integer number (304307388).

Almost surely, 2^20202220020 is an apocalyptic number.

20202220020 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 20202220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29213509248).

20202220020 is an abundant number, since it is smaller than the sum of its proper divisors (38224798476).

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

20202220020 is a wasteful number, since it uses less digits than its factorization.

20202220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

Adding to 20202220020 its reverse (2002220202), we get a palindrome (22204440222).

The spelling of 20202220020 in words is "twenty billion, two hundred two million, two hundred twenty thousand, twenty".