20403434200 has 96 divisors (see below), whose sum is σ = 48236310000. Its totient is φ = 8025152000.

The previous prime is 20403434131. The next prime is 20403434237. The reversal of 20403434200 is 243430402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3006411 + ... + 3013189.

Almost surely, 2^20403434200 is an apocalyptic number.

20403434200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20403434200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24118155000).

20403434200 is an abundant number, since it is smaller than the sum of its proper divisors (27832875800).

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

20403434200 is a wasteful number, since it uses less digits than its factorization.

20403434200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045 (or 7036 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20403434200 its reverse (243430402), we get a palindrome (20646864602).

The spelling of 20403434200 in words is "twenty billion, four hundred three million, four hundred thirty-four thousand, two hundred".