20008872 has 48 divisors (see below), whose sum is σ = 58361940. Its totient is φ = 6156288.

The previous prime is 20008871. The next prime is 20008903. The reversal of 20008872 is 27880002.

It can be written as a sum of positive squares in 2 ways, for example, as 16112196 + 3896676 = 4014^2 + 1974^2 .

It is not an unprimeable number, because it can be changed into a prime (20008871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9753 + ... + 11624.

Almost surely, 2^20008872 is an apocalyptic number.

It is an amenable number.

20008872 is an abundant number, since it is smaller than the sum of its proper divisors (38353068).

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

20008872 is a wasteful number, since it uses less digits than its factorization.

20008872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21402 (or 21395 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 20008872 is about 4473.1277647749. The cubic root of 20008872 is about 271.4818929145.

Adding to 20008872 its reverse (27880002), we get a palindrome (47888874).

The spelling of 20008872 in words is "twenty million, eight thousand, eight hundred seventy-two".