20550605061 has 16 divisors (see below), whose sum is σ = 31430770688. Its totient is φ = 11699866800.

The previous prime is 20550605017. The next prime is 20550605113. The reversal of 20550605061 is 16050605502.

It is not a de Polignac number, because 20550605061 - 2¹¹ = 20550603013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550600061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1799845 + ... + 1811226.

It is an arithmetic number, because the mean of its divisors is an integer number (1964423168).

Almost surely, 2^20550605061 is an apocalyptic number.

20550605061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20550605061 is a deficient number, since it is larger than the sum of its proper divisors (10880165627).

20550605061 is a wasteful number, since it uses less digits than its factorization.

20550605061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611352.

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 20550605061 in words is "twenty billion, five hundred fifty million, six hundred five thousand, sixty-one".