20430003400 has 96 divisors (see below), whose sum is σ = 48162988800. Its totient is φ = 8058406400.

The previous prime is 20430003359. The next prime is 20430003401. The reversal of 20430003400 is 430003402.

It is not an unprimeable number, because it can be changed into a prime (20430003401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7670469 + ... + 7673131.

It is an arithmetic number, because the mean of its divisors is an integer number (501697800).

Almost surely, 2^20430003400 is an apocalyptic number.

20430003400 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 20430003400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24081494400).

20430003400 is an abundant number, since it is smaller than the sum of its proper divisors (27732985400).

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

20430003400 is a wasteful number, since it uses less digits than its factorization.

20430003400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199 (or 3190 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

Adding to 20430003400 its reverse (430003402), we get a palindrome (20860006802).

The spelling of 20430003400 in words is "twenty billion, four hundred thirty million, three thousand, four hundred".