20008550 has 24 divisors (see below), whose sum is σ = 38502000. Its totient is φ = 7726880.

The previous prime is 20008531. The next prime is 20008553. The reversal of 20008550 is 5580002.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20008553) 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, 5450 + ... + 8349.

It is an arithmetic number, because the mean of its divisors is an integer number (1604250).

Almost surely, 2^20008550 is an apocalyptic number.

20008550 is a deficient number, since it is larger than the sum of its proper divisors (18493450).

20008550 is a wasteful number, since it uses less digits than its factorization.

20008550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13840 (or 13835 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 20008550 is about 4473.0917719179. The cubic root of 20008550 is about 271.4804365999.

Adding to 20008550 its reverse (5580002), we get a palindrome (25588552).

The spelling of 20008550 in words is "twenty million, eight thousand, five hundred fifty".