20310203400 has 96 divisors (see below), whose sum is σ = 63194467200. Its totient is φ = 5396025600.

The previous prime is 20310203359. The next prime is 20310203401. The reversal of 20310203400 is 430201302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20310203400.

It is not an unprimeable number, because it can be changed into a prime (20310203401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100146 + ... + 225054.

It is an arithmetic number, because the mean of its divisors is an integer number (658275700).

Almost surely, 2^20310203400 is an apocalyptic number.

20310203400 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 20310203400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31597233600).

20310203400 is an abundant number, since it is smaller than the sum of its proper divisors (42884263800).

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

20310203400 is a wasteful number, since it uses less digits than its factorization.

20310203400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125199 (or 125190 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20310203400 its reverse (430201302), we get a palindrome (20740404702).

The spelling of 20310203400 in words is "twenty billion, three hundred ten million, two hundred three thousand, four hundred".