20403010320 has 480 divisors, whose sum is σ = 82217237760. Its totient is φ = 4092211200.

The previous prime is 20403010289. The next prime is 20403010321. The reversal of 20403010320 is 2301030402.

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 20403010320.

It is not an unprimeable number, because it can be changed into a prime (20403010321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5893390 + ... + 5896850.

It is an arithmetic number, because the mean of its divisors is an integer number (171285912).

Almost surely, 2^20403010320 is an apocalyptic number.

20403010320 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 20403010320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41108618880).

20403010320 is an abundant number, since it is smaller than the sum of its proper divisors (61814227440).

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

20403010320 is a wasteful number, since it uses less digits than its factorization.

20403010320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535 (or 3518 counting only the distinct ones).

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

Adding to 20403010320 its reverse (2301030402), we get a palindrome (22704040722).

The spelling of 20403010320 in words is "twenty billion, four hundred three million, ten thousand, three hundred twenty".