20164656005 has 16 divisors (see below), whose sum is σ = 26447885184. Its totient is φ = 14668568640.

The previous prime is 20164655999. The next prime is 20164656007. The reversal of 20164656005 is 50065646102.

It is not a de Polignac number, because 20164656005 - 2¹⁰ = 20164654981 is a prime.

It is a super-2 number, since 2×20164656005² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164656007) 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 15 ways as a sum of consecutive naturals, for example, 2310761 + ... + 2319470.

It is an arithmetic number, because the mean of its divisors is an integer number (1652992824).

Almost surely, 2^20164656005 is an apocalyptic number.

It is an amenable number.

20164656005 is a deficient number, since it is larger than the sum of its proper divisors (6283229179).

20164656005 is a wasteful number, since it uses less digits than its factorization.

20164656005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630316.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 20164656005 in words is "twenty billion, one hundred sixty-four million, six hundred fifty-six thousand, five".