20432580 has 48 divisors (see below), whose sum is σ = 65385600. Its totient is φ = 4670208.

The previous prime is 20432563. The next prime is 20432597. The reversal of 20432580 is 8523402.

It is an interprime number because it is at equal distance from previous prime (20432563) and next prime (20432597).

It is a self number, because there is not a number n which added to its sum of digits gives 20432580.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23905 + ... + 24744.

It is an arithmetic number, because the mean of its divisors is an integer number (1362200).

Almost surely, 2^20432580 is an apocalyptic number.

20432580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20432580 is an abundant number, since it is smaller than the sum of its proper divisors (44953020).

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

20432580 is a wasteful number, since it uses less digits than its factorization.

20432580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48668 (or 48666 counting only the distinct ones).

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

The square root of 20432580 is about 4520.2411440099. The cubic root of 20432580 is about 273.3848240625.

Adding to 20432580 its reverse (8523402), we get a palindrome (28955982).

It can be divided in two parts, 20432 and 580, that added together give a palindrome (21012).

The spelling of 20432580 in words is "twenty million, four hundred thirty-two thousand, five hundred eighty".