20730209808 has 240 divisors, whose sum is σ = 67483680768. Its totient is φ = 5367648000.

The previous prime is 20730209807. The next prime is 20730209827. The reversal of 20730209808 is 80890203702.

It is not an unprimeable number, because it can be changed into a prime (20730209807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18010033 + ... + 18011183.

Almost surely, 2^20730209808 is an apocalyptic number.

20730209808 is a gapful number since it is divisible by the number (28) 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 20730209808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33741840384).

20730209808 is an abundant number, since it is smaller than the sum of its proper divisors (46753470960).

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

20730209808 is a wasteful number, since it uses less digits than its factorization.

20730209808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 20730209808 in words is "twenty billion, seven hundred thirty million, two hundred nine thousand, eight hundred eight".