20555514005 has 16 divisors (see below), whose sum is σ = 26570725104. Its totient is φ = 15175641600.

The previous prime is 20555513989. The next prime is 20555514013. The reversal of 20555514005 is 50041555502.

It can be written as a sum of positive squares in 8 ways, for example, as 2338883044 + 18216630961 = 48362^2 + 134969^2 .

It is not a de Polignac number, because 20555514005 - 2⁴ = 20555513989 is a prime.

It is a super-2 number, since 2×20555514005² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235427 + ... + 310703.

It is an arithmetic number, because the mean of its divisors is an integer number (1660670319).

Almost surely, 2^20555514005 is an apocalyptic number.

It is an amenable number.

20555514005 is a deficient number, since it is larger than the sum of its proper divisors (6015211099).

20555514005 is a wasteful number, since it uses less digits than its factorization.

20555514005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79496.

The product of its (nonzero) digits is 25000, while the sum is 32.

The spelling of 20555514005 in words is "twenty billion, five hundred fifty-five million, five hundred fourteen thousand, five".