20011134 has 64 divisors (see below), whose sum is σ = 47755008. Its totient is φ = 5510400.

The previous prime is 20011099. The next prime is 20011139. The reversal of 20011134 is 43111002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011139) 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 31 ways as a sum of consecutive naturals, for example, 71074 + ... + 71354.

It is an arithmetic number, because the mean of its divisors is an integer number (746172).

Almost surely, 2^20011134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23877504).

20011134 is an abundant number, since it is smaller than the sum of its proper divisors (27743874).

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

20011134 is a wasteful number, since it uses less digits than its factorization.

20011134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20011134 is about 4473.3806008432. The cubic root of 20011134 is about 271.4921228582.

Adding to 20011134 its reverse (43111002), we get a palindrome (63122136).

The spelling of 20011134 in words is "twenty million, eleven thousand, one hundred thirty-four".