20025660 has 96 divisors (see below), whose sum is σ = 61508160. Its totient is φ = 4845568.

The previous prime is 20025637. The next prime is 20025661. The reversal of 20025660 is 6652002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025661) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 29242 + ... + 29918.

It is an arithmetic number, because the mean of its divisors is an integer number (640710).

Almost surely, 2^20025660 is an apocalyptic number.

20025660 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 20025660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30754080).

20025660 is an abundant number, since it is smaller than the sum of its proper divisors (41482500).

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

20025660 is a wasteful number, since it uses less digits than its factorization.

20025660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20025660 is about 4475.0039106128. The cubic root of 20025660 is about 271.5577986419.

Adding to 20025660 its reverse (6652002), we get a palindrome (26677662).

The spelling of 20025660 in words is "twenty million, twenty-five thousand, six hundred sixty".