20327580 has 288 divisors, whose sum is σ = 81454464. Its totient is φ = 3981312.

The previous prime is 20327509. The next prime is 20327603. The reversal of 20327580 is 8572302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 278424 + ... + 278496.

It is an arithmetic number, because the mean of its divisors is an integer number (282828).

Almost surely, 2^20327580 is an apocalyptic number.

20327580 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 20327580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40727232).

20327580 is an abundant number, since it is smaller than the sum of its proper divisors (61126884).

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

20327580 is a wasteful number, since it uses less digits than its factorization.

20327580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20327580 is about 4508.6117597327. The cubic root of 20327580 is about 272.9157249027.

Adding to 20327580 its reverse (8572302), we get a palindrome (28899882).

The spelling of 20327580 in words is "twenty million, three hundred twenty-seven thousand, five hundred eighty".