20133712 has 20 divisors (see below), whose sum is σ = 41304276. Its totient is φ = 9474560.

The previous prime is 20133689. The next prime is 20133713. The reversal of 20133712 is 21733102.

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 9217296 = 3304^2 + 3036^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20133712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133713) 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, 36739 + ... + 37282.

Almost surely, 2^20133712 is an apocalyptic number.

It is an amenable number.

20133712 is an abundant number, since it is smaller than the sum of its proper divisors (21170564).

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

20133712 is a wasteful number, since it uses less digits than its factorization.

20133712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74046 (or 74040 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20133712 is about 4487.0605077266. The cubic root of 20133712 is about 272.0453355805.

Adding to 20133712 its reverse (21733102), we get a palindrome (41866814).

The spelling of 20133712 in words is "twenty million, one hundred thirty-three thousand, seven hundred twelve".