20430000550 has 12 divisors (see below), whose sum is σ = 37999801116. Its totient is φ = 8172000200.

The previous prime is 20430000541. The next prime is 20430000551. The reversal of 20430000550 is 5500003402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430000551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204299956 + ... + 204300055.

It is an arithmetic number, because the mean of its divisors is an integer number (3166650093).

Almost surely, 2^20430000550 is an apocalyptic number.

20430000550 is a deficient number, since it is larger than the sum of its proper divisors (17569800566).

20430000550 is a wasteful number, since it uses less digits than its factorization.

20430000550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408600023 (or 408600018 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

Adding to 20430000550 its reverse (5500003402), we get a palindrome (25930003952).

The spelling of 20430000550 in words is "twenty billion, four hundred thirty million, five hundred fifty", and thus it is an aban number.