20135164 has 48 divisors (see below), whose sum is σ = 42194880. Its totient is φ = 8225280.

The previous prime is 20135147. The next prime is 20135183. The reversal of 20135164 is 46153102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111154 + ... + 111334.

It is an arithmetic number, because the mean of its divisors is an integer number (879060).

Almost surely, 2^20135164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20135164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21097440).

20135164 is an abundant number, since it is smaller than the sum of its proper divisors (22059716).

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

20135164 is a wasteful number, since it uses less digits than its factorization.

20135164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20135164 is about 4487.2223033855. Note that the first 3 decimals coincide. The cubic root of 20135164 is about 272.0518751981.

Adding to 20135164 its reverse (46153102), we get a palindrome (66288266).

The spelling of 20135164 in words is "twenty million, one hundred thirty-five thousand, one hundred sixty-four".