20303423400 has 144 divisors (see below), whose sum is σ = 68154968160. Its totient is φ = 4997740800.

The previous prime is 20303423381. The next prime is 20303423429. The reversal of 20303423400 is 432430302.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1285 + ... + 201515.

It is an arithmetic number, because the mean of its divisors is an integer number (473298390).

Almost surely, 2^20303423400 is an apocalyptic number.

20303423400 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 20303423400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34077484080).

20303423400 is an abundant number, since it is smaller than the sum of its proper divisors (47851544760).

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

20303423400 is a wasteful number, since it uses less digits than its factorization.

20303423400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200276 (or 200254 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

Adding to 20303423400 its reverse (432430302), we get a palindrome (20735853702).

The spelling of 20303423400 in words is "twenty billion, three hundred three million, four hundred twenty-three thousand, four hundred".