20180164 has 12 divisors (see below), whose sum is σ = 35442064. Its totient is φ = 10053864.

The previous prime is 20180161. The next prime is 20180179. The reversal of 20180164 is 46108102.

It is not an unprimeable number, because it can be changed into a prime (20180161) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7782 + ... + 10045.

Almost surely, 2^20180164 is an apocalyptic number.

It is an amenable number.

20180164 is a deficient number, since it is larger than the sum of its proper divisors (15261900).

20180164 is a wasteful number, since it uses less digits than its factorization.

20180164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18114 (or 18112 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20180164 is about 4492.2337428055. The cubic root of 20180164 is about 272.2543936310.

Adding to 20180164 its reverse (46108102), we get a palindrome (66288266).

The spelling of 20180164 in words is "twenty million, one hundred eighty thousand, one hundred sixty-four".