20325240 has 192 divisors, whose sum is σ = 73513440. Its totient is φ = 4838400.

The previous prime is 20325233. The next prime is 20325257. The reversal of 20325240 is 4252302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 201190 + ... + 201290.

Almost surely, 2^20325240 is an apocalyptic number.

20325240 is a gapful number since it is divisible by the number (20) 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 20325240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36756720).

20325240 is an abundant number, since it is smaller than the sum of its proper divisors (53188200).

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

20325240 is a wasteful number, since it uses less digits than its factorization.

20325240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20325240 is about 4508.3522488821. The cubic root of 20325240 is about 272.9052523116.

Adding to 20325240 its reverse (4252302), we get a palindrome (24577542).

The spelling of 20325240 in words is "twenty million, three hundred twenty-five thousand, two hundred forty".