20430042203220 has 192 divisors, whose sum is σ = 63235984331520. Its totient is φ = 4896483766272.

The previous prime is 20430042203189. The next prime is 20430042203227. The reversal of 20430042203220 is 2230224003402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430042203227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9671416 + ... + 11592944.

It is an arithmetic number, because the mean of its divisors is an integer number (329354085060).

Almost surely, 2^{20430042203220} is an apocalyptic number.

20430042203220 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 20430042203220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31617992165760).

20430042203220 is an abundant number, since it is smaller than the sum of its proper divisors (42805942128300).

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

20430042203220 is a wasteful number, since it uses less digits than its factorization.

20430042203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921914 (or 1921912 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20430042203220 its reverse (2230224003402), we get a palindrome (22660266206622).

The spelling of 20430042203220 in words is "twenty trillion, four hundred thirty billion, forty-two million, two hundred three thousand, two hundred twenty".