20010020320 has 96 divisors (see below), whose sum is σ = 49348154016. Its totient is φ = 7659878400.

The previous prime is 20010020281. The next prime is 20010020347. The reversal of 20010020320 is 2302001002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20010020297 and 20010020306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333415 + ... + 388825.

It is an arithmetic number, because the mean of its divisors is an integer number (514043271).

Almost surely, 2^20010020320 is an apocalyptic number.

20010020320 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 20010020320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24674077008).

20010020320 is an abundant number, since it is smaller than the sum of its proper divisors (29338133696).

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

20010020320 is a wasteful number, since it uses less digits than its factorization.

20010020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55524 (or 55516 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 20010020320 its reverse (2302001002), we get a palindrome (22312021322).

The spelling of 20010020320 in words is "twenty billion, ten million, twenty thousand, three hundred twenty".