20773371808 has 96 divisors (see below), whose sum is σ = 48791393280. Its totient is φ = 8518625280.

The previous prime is 20773371803. The next prime is 20773371823. The reversal of 20773371808 is 80817337702.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20773371803) 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 15 ways as a sum of consecutive naturals, for example, 601210 + ... + 634822.

It is an arithmetic number, because the mean of its divisors is an integer number (508243680).

Almost surely, 2^20773371808 is an apocalyptic number.

20773371808 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 20773371808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24395696640).

20773371808 is an abundant number, since it is smaller than the sum of its proper divisors (28018021472).

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

20773371808 is a wasteful number, since it uses less digits than its factorization.

20773371808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33750 (or 33742 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 20773371808 in words is "twenty billion, seven hundred seventy-three million, three hundred seventy-one thousand, eight hundred eight".