20030820320 has 96 divisors (see below), whose sum is σ = 54147538368. Its totient is φ = 6859542528.

The previous prime is 20030820287. The next prime is 20030820323. The reversal of 20030820320 is 2302803002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20030820292 and 20030820301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030820323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972044 + ... + 992436.

It is an arithmetic number, because the mean of its divisors is an integer number (564036858).

Almost surely, 2^20030820320 is an apocalyptic number.

20030820320 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 20030820320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27073769184).

20030820320 is an abundant number, since it is smaller than the sum of its proper divisors (34116718048).

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

20030820320 is a wasteful number, since it uses less digits than its factorization.

20030820320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21292 (or 21284 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The spelling of 20030820320 in words is "twenty billion, thirty million, eight hundred twenty thousand, three hundred twenty".