20325560 has 32 divisors (see below), whose sum is σ = 47723040. Its totient is φ = 7776384.

The previous prime is 20325533. The next prime is 20325581. The reversal of 20325560 is 6552302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10127 + ... + 11966.

It is an arithmetic number, because the mean of its divisors is an integer number (1491345).

Almost surely, 2^20325560 is an apocalyptic number.

20325560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20325560 is an abundant number, since it is smaller than the sum of its proper divisors (27397480).

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

20325560 is a wasteful number, since it uses less digits than its factorization.

20325560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22127 (or 22123 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20325560 is about 4508.3877384271. The cubic root of 20325560 is about 272.9066845082.

Adding to 20325560 its reverse (6552302), we get a palindrome (26877862).

The spelling of 20325560 in words is "twenty million, three hundred twenty-five thousand, five hundred sixty".