20534136 has 96 divisors (see below), whose sum is σ = 62928000. Its totient is φ = 5552064.

The previous prime is 20534099. The next prime is 20534141. The reversal of 20534136 is 63143502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 23 ways as a sum of consecutive naturals, for example, 21885 + ... + 22803.

It is an arithmetic number, because the mean of its divisors is an integer number (655500).

Almost surely, 2^20534136 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 20534136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31464000).

20534136 is an abundant number, since it is smaller than the sum of its proper divisors (42393864).

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

20534136 is a wasteful number, since it uses less digits than its factorization.

20534136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 950 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20534136 is about 4531.4606916534. The cubic root of 20534136 is about 273.8370103512.

Adding to 20534136 its reverse (63143502), we get a palindrome (83677638).

The spelling of 20534136 in words is "twenty million, five hundred thirty-four thousand, one hundred thirty-six".