20061606320 has 160 divisors (see below), whose sum is σ = 54475846656. Its totient is φ = 6728832000.

The previous prime is 20061606287. The next prime is 20061606329. The reversal of 20061606320 is 2360616002.

It is a Cunningham number, because it is equal to 141639²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 20061606320.

It is not an unprimeable number, because it can be changed into a prime (20061606329) 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 31 ways as a sum of consecutive naturals, for example, 5663750 + ... + 5667290.

Almost surely, 2^20061606320 is an apocalyptic number.

20061606320 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 20061606320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27237923328).

20061606320 is an abundant number, since it is smaller than the sum of its proper divisors (34414240336).

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

20061606320 is a wasteful number, since it uses less digits than its factorization.

20061606320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779 (or 3773 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 20061606320 in words is "twenty billion, sixty-one million, six hundred six thousand, three hundred twenty".