20420143040220 has 384 divisors, whose sum is σ = 74972786982912. Its totient is φ = 4028792601600.

The previous prime is 20420143040179. The next prime is 20420143040261. The reversal of 20420143040220 is 2204034102402.

It is an interprime number because it is at equal distance from previous prime (20420143040179) and next prime (20420143040261).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6245577 + ... + 8935743.

It is an arithmetic number, because the mean of its divisors is an integer number (195241632768).

Almost surely, 2^{20420143040220} is an apocalyptic number.

20420143040220 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 20420143040220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37486393491456).

20420143040220 is an abundant number, since it is smaller than the sum of its proper divisors (54552643942692).

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

20420143040220 is a wasteful number, since it uses less digits than its factorization.

20420143040220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690281 (or 2690279 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20420143040220 its reverse (2204034102402), we get a palindrome (22624177142622).

The spelling of 20420143040220 in words is "twenty trillion, four hundred twenty billion, one hundred forty-three million, forty thousand, two hundred twenty".