20420434200 has 96 divisors (see below), whose sum is σ = 64248298560. Its totient is φ = 5364163200.

The previous prime is 20420434169. The next prime is 20420434201. The reversal of 20420434200 is 243402402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420434201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213786 + ... + 294185.

It is an arithmetic number, because the mean of its divisors is an integer number (669253110).

Almost surely, 2^20420434200 is an apocalyptic number.

20420434200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420434200 is an abundant number, since it is smaller than the sum of its proper divisors (43827864360).

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

20420434200 is a wasteful number, since it uses less digits than its factorization.

20420434200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508057 (or 508048 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20420434200 its reverse (243402402), we get a palindrome (20663836602).

The spelling of 20420434200 in words is "twenty billion, four hundred twenty million, four hundred thirty-four thousand, two hundred".