20323136 has 28 divisors (see below), whose sum is σ = 40733472. Its totient is φ = 10059648.

The previous prime is 20323091. The next prime is 20323139. The reversal of 20323136 is 63132302.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5051 + ... + 8133.

Almost surely, 2^20323136 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 20323136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20366736).

20323136 is an abundant number, since it is smaller than the sum of its proper divisors (20410336).

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

20323136 is a wasteful number, since it uses less digits than its factorization.

20323136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198 (or 3188 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20323136 is about 4508.1188981658. The cubic root of 20323136 is about 272.8958352442.

Adding to 20323136 its reverse (63132302), we get a palindrome (83455438).

The spelling of 20323136 in words is "twenty million, three hundred twenty-three thousand, one hundred thirty-six".