20009339280 has 960 divisors, whose sum is σ = 85794508800. Its totient is φ = 4232632320.

The previous prime is 20009339249. The next prime is 20009339321. The reversal of 20009339280 is 8293390002.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 183571866 + ... + 183571974.

It is an arithmetic number, because the mean of its divisors is an integer number (89369280).

Almost surely, 2^20009339280 is an apocalyptic number.

20009339280 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 20009339280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42897254400).

20009339280 is an abundant number, since it is smaller than the sum of its proper divisors (65785169520).

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

20009339280 is a wasteful number, since it uses less digits than its factorization.

20009339280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 20009339280 in words is "twenty billion, nine million, three hundred thirty-nine thousand, two hundred eighty".