20164512677 has 4 divisors (see below), whose sum is σ = 20190735180. Its totient is φ = 20138290176.

The previous prime is 20164512671. The next prime is 20164512707. The reversal of 20164512677 is 77621546102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3638381761 + 16526130916 = 60319^2 + 128554^2 .

It is a cyclic number.

It is not a de Polignac number, because 20164512677 - 2¹⁶ = 20164447141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164512671) 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 3 ways as a sum of consecutive naturals, for example, 13110098 + ... + 13111635.

It is an arithmetic number, because the mean of its divisors is an integer number (5047683795).

Almost surely, 2^20164512677 is an apocalyptic number.

It is an amenable number.

20164512677 is a deficient number, since it is larger than the sum of its proper divisors (26222503).

20164512677 is an equidigital number, since it uses as much as digits as its factorization.

20164512677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26222502.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 20164512677 in words is "twenty billion, one hundred sixty-four million, five hundred twelve thousand, six hundred seventy-seven".