20201234430 has 128 divisors (see below), whose sum is σ = 52703239680. Its totient is φ = 4926113280.

The previous prime is 20201234423. The next prime is 20201234477. The reversal of 20201234430 is 3443210202.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20201234397 and 20201234406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29576869 + ... + 29577551.

It is an arithmetic number, because the mean of its divisors is an integer number (411744060).

Almost surely, 2^20201234430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201234430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26351619840).

20201234430 is an abundant number, since it is smaller than the sum of its proper divisors (32502005250).

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

20201234430 is a wasteful number, since it uses less digits than its factorization.

20201234430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20201234430 its reverse (3443210202), we get a palindrome (23644444632).

The spelling of 20201234430 in words is "twenty billion, two hundred one million, two hundred thirty-four thousand, four hundred thirty".