20325136 has 80 divisors (see below), whose sum is σ = 46177600. Its totient is φ = 8584704.

The previous prime is 20325133. The next prime is 20325161. The reversal of 20325136 is 63152302.

It is a super-2 number, since 2×20325136² = 826222306836992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20325131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146155 + ... + 146293.

It is an arithmetic number, because the mean of its divisors is an integer number (577220).

Almost surely, 2^20325136 is an apocalyptic number.

20325136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20325136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23088800).

20325136 is an abundant number, since it is smaller than the sum of its proper divisors (25852464).

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

20325136 is a wasteful number, since it uses less digits than its factorization.

20325136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 210 counting only the distinct ones).

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

The square root of 20325136 is about 4508.3407147198. The cubic root of 20325136 is about 272.9047868444.

Adding to 20325136 its reverse (63152302), we get a palindrome (83477438).

The spelling of 20325136 in words is "twenty million, three hundred twenty-five thousand, one hundred thirty-six".