20355334320 has 160 divisors (see below), whose sum is σ = 66253259520. Its totient is φ = 5162572800.

The previous prime is 20355334313. The next prime is 20355334331. The reversal of 20355334320 is 2343355302.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 444495 + ... + 488145.

It is an arithmetic number, because the mean of its divisors is an integer number (414082872).

Almost surely, 2^20355334320 is an apocalyptic number.

20355334320 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 20355334320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33126629760).

20355334320 is an abundant number, since it is smaller than the sum of its proper divisors (45897925200).

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

20355334320 is a wasteful number, since it uses less digits than its factorization.

20355334320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43763 (or 43757 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 30.

Adding to 20355334320 its reverse (2343355302), we get a palindrome (22698689622).

The spelling of 20355334320 in words is "twenty billion, three hundred fifty-five million, three hundred thirty-four thousand, three hundred twenty".