20235236 has 36 divisors (see below), whose sum is σ = 43623468. Its totient is φ = 8160768.

The previous prime is 20235233. The next prime is 20235251. The reversal of 20235236 is 63253202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17172736 + 3062500 = 4144^2 + 1750^2 .

It is not an unprimeable number, because it can be changed into a prime (20235233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296 + ... + 6368.

It is an arithmetic number, because the mean of its divisors is an integer number (1211763).

Almost surely, 2^20235236 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 20235236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21811734).

20235236 is an abundant number, since it is smaller than the sum of its proper divisors (23388232).

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

20235236 is a wasteful number, since it uses less digits than its factorization.

20235236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108 (or 6099 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20235236 is about 4498.3592564401. The cubic root of 20235236 is about 272.5018309222.

Adding to 20235236 its reverse (63253202), we get a palindrome (83488438).

The spelling of 20235236 in words is "twenty million, two hundred thirty-five thousand, two hundred thirty-six".