20430164 has 12 divisors (see below), whose sum is σ = 37307424. Its totient is φ = 9770904.

The previous prime is 20430143. The next prime is 20430167. The reversal of 20430164 is 46103402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110942 + ... + 111125.

It is an arithmetic number, because the mean of its divisors is an integer number (3108952).

Almost surely, 2^20430164 is an apocalyptic number.

It is an amenable number.

20430164 is a deficient number, since it is larger than the sum of its proper divisors (16877260).

20430164 is a wasteful number, since it uses less digits than its factorization.

20430164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222094 (or 222092 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20430164 is about 4519.9738937299. The cubic root of 20430164 is about 273.3740483998.

Adding to 20430164 its reverse (46103402), we get a palindrome (66533566).

The spelling of 20430164 in words is "twenty million, four hundred thirty thousand, one hundred sixty-four".