20027660 has 24 divisors (see below), whose sum is σ = 42448560. Its totient is φ = 7936704.

The previous prime is 20027659. The next prime is 20027663. The reversal of 20027660 is 6672002.

It is a happy number.

It is a super-2 number, since 2×20027660² = 802214330151200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20027663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2414 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (1768690).

Almost surely, 2^20027660 is an apocalyptic number.

20027660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20027660 is an abundant number, since it is smaller than the sum of its proper divisors (22420900).

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

20027660 is a wasteful number, since it uses less digits than its factorization.

20027660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9305 (or 9303 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20027660 is about 4475.2273685255. The cubic root of 20027660 is about 271.5668386688.

Adding to 20027660 its reverse (6672002), we get a palindrome (26699662).

The spelling of 20027660 in words is "twenty million, twenty-seven thousand, six hundred sixty".