20325540 has 48 divisors (see below), whose sum is σ = 60262272. Its totient is φ = 5101056.

The previous prime is 20325533. The next prime is 20325581. The reversal of 20325540 is 4552302.

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, 8944 + ... + 10983.

It is an arithmetic number, because the mean of its divisors is an integer number (1255464).

Almost surely, 2^20325540 is an apocalyptic number.

20325540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20325540 is an abundant number, since it is smaller than the sum of its proper divisors (39936732).

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

20325540 is a wasteful number, since it uses less digits than its factorization.

20325540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19956 (or 19954 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20325540 is about 4508.3855203387. The cubic root of 20325540 is about 272.9065949964.

Adding to 20325540 its reverse (4552302), we get a palindrome (24877842).

The spelling of 20325540 in words is "twenty million, three hundred twenty-five thousand, five hundred forty".