20324580 has 48 divisors (see below), whose sum is σ = 57341760. Its totient is φ = 5378688.

The previous prime is 20324573. The next prime is 20324609. The reversal of 20324580 is 8542302.

It is a self number, because there is not a number n which added to its sum of digits gives 20324580.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7122 + ... + 9558.

It is an arithmetic number, because the mean of its divisors is an integer number (1194620).

Almost surely, 2^20324580 is an apocalyptic number.

20324580 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 20324580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28670880).

20324580 is an abundant number, since it is smaller than the sum of its proper divisors (37017180).

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

20324580 is a wasteful number, since it uses less digits than its factorization.

20324580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588 (or 2586 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20324580 is about 4508.2790508131. The cubic root of 20324580 is about 272.9022983585.

Adding to 20324580 its reverse (8542302), we get a palindrome (28866882).

The spelling of 20324580 in words is "twenty million, three hundred twenty-four thousand, five hundred eighty".