20320304370 has 64 divisors (see below), whose sum is σ = 49489885440. Its totient is φ = 5338726400.

The previous prime is 20320304369. The next prime is 20320304423. The reversal of 20320304370 is 7340302302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20320304370.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4532530 + ... + 4537010.

It is an arithmetic number, because the mean of its divisors is an integer number (773279460).

Almost surely, 2^20320304370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20320304370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24744942720).

20320304370 is an abundant number, since it is smaller than the sum of its proper divisors (29169581070).

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

20320304370 is a wasteful number, since it uses less digits than its factorization.

20320304370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6691.

The product of its (nonzero) digits is 3024, while the sum is 24.

Adding to 20320304370 its reverse (7340302302), we get a palindrome (27660606672).

The spelling of 20320304370 in words is "twenty billion, three hundred twenty million, three hundred four thousand, three hundred seventy".