20235136 has 32 divisors (see below), whose sum is σ = 40698000. Its totient is φ = 10020864.

The previous prime is 20235121. The next prime is 20235143. The reversal of 20235136 is 63153202.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13765 + ... + 15163.

Almost surely, 2^20235136 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 20235136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20349000).

20235136 is an abundant number, since it is smaller than the sum of its proper divisors (20462864).

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

20235136 is a wasteful number, since it uses less digits than its factorization.

20235136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20235136 is about 4498.3481412625. The cubic root of 20235136 is about 272.5013820315.

Adding to 20235136 its reverse (63153202), we get a palindrome (83388338).

The spelling of 20235136 in words is "twenty million, two hundred thirty-five thousand, one hundred thirty-six".