20550602660 has 192 divisors, whose sum is σ = 53542798848. Its totient is φ = 6465478656.

The previous prime is 20550602647. The next prime is 20550602719. The reversal of 20550602660 is 6620605502.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 24849167 + ... + 24849993.

It is an arithmetic number, because the mean of its divisors is an integer number (278868744).

Almost surely, 2^20550602660 is an apocalyptic number.

20550602660 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 20550602660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26771399424).

20550602660 is an abundant number, since it is smaller than the sum of its proper divisors (32992196188).

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

20550602660 is a wasteful number, since it uses less digits than its factorization.

20550602660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20550602660 in words is "twenty billion, five hundred fifty million, six hundred two thousand, six hundred sixty".