20550560631 has 8 divisors (see below), whose sum is σ = 27917742960. Its totient is φ = 13441876032.

The previous prime is 20550560627. The next prime is 20550560663. The reversal of 20550560631 is 13606505502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20550560631 - 2² = 20550560627 is a prime.

It is a super-2 number, since 2×20550560631² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20550560592 and 20550560601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550560621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64624246 + ... + 64624563.

It is an arithmetic number, because the mean of its divisors is an integer number (3489717870).

Almost surely, 2^20550560631 is an apocalyptic number.

20550560631 is a deficient number, since it is larger than the sum of its proper divisors (7367182329).

20550560631 is a wasteful number, since it uses less digits than its factorization.

20550560631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129248865.

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 20550560631 in words is "twenty billion, five hundred fifty million, five hundred sixty thousand, six hundred thirty-one".