20161164 has 24 divisors (see below), whose sum is σ = 47127808. Its totient is φ = 6708240.

The previous prime is 20161157. The next prime is 20161199. The reversal of 20161164 is 46116102.

It is a self number, because there is not a number n which added to its sum of digits gives 20161164.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7569 + ... + 9879.

Almost surely, 2^20161164 is an apocalyptic number.

It is an amenable number.

20161164 is an abundant number, since it is smaller than the sum of its proper divisors (26966644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20161164 is a wasteful number, since it uses less digits than its factorization.

20161164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045 (or 3043 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20161164 is about 4490.1184839601. The cubic root of 20161164 is about 272.1689226082.

Adding to 20161164 its reverse (46116102), we get a palindrome (66277266).

The spelling of 20161164 in words is "twenty million, one hundred sixty-one thousand, one hundred sixty-four".