20911134 has 32 divisors (see below), whose sum is σ = 44784000. Its totient is φ = 6489504.

The previous prime is 20911129. The next prime is 20911157. The reversal of 20911134 is 43111902.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20911134.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5172 + ... + 8280.

It is an arithmetic number, because the mean of its divisors is an integer number (1399500).

Almost surely, 2^20911134 is an apocalyptic number.

20911134 is an abundant number, since it is smaller than the sum of its proper divisors (23872866).

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

20911134 is a wasteful number, since it uses less digits than its factorization.

20911134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 20911134 is about 4572.8693399221. The cubic root of 20911134 is about 275.5027014358.

The spelling of 20911134 in words is "twenty million, nine hundred eleven thousand, one hundred thirty-four".