20164633163 has 4 divisors (see below), whose sum is σ = 21041356368. Its totient is φ = 19287909960.

The previous prime is 20164633087. The next prime is 20164633199. The reversal of 20164633163 is 36133646102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36133646102 = 2 ⋅18066823051.

It is a cyclic number.

It is not a de Polignac number, because 20164633163 - 2⁸ = 20164632907 is a prime.

It is a super-2 number, since 2×20164633163² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20164623163) 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 3 ways as a sum of consecutive naturals, for example, 438361568 + ... + 438361613.

It is an arithmetic number, because the mean of its divisors is an integer number (5260339092).

Almost surely, 2^20164633163 is an apocalyptic number.

20164633163 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20164633163 is a deficient number, since it is larger than the sum of its proper divisors (876723205).

20164633163 is an equidigital number, since it uses as much as digits as its factorization.

20164633163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876723204.

The product of its (nonzero) digits is 46656, while the sum is 35.

The spelling of 20164633163 in words is "twenty billion, one hundred sixty-four million, six hundred thirty-three thousand, one hundred sixty-three".