20430340000 has 120 divisors (see below), whose sum is σ = 57442337568. Its totient is φ = 7004640000.

The previous prime is 20430339929. The next prime is 20430340001. The reversal of 20430340000 is 4303402.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (20430340001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 67035 + ... + 212965.

Almost surely, 2^20430340000 is an apocalyptic number.

20430340000 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 20430340000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28721168784).

20430340000 is an abundant number, since it is smaller than the sum of its proper divisors (37011997568).

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

20430340000 is an equidigital number, since it uses as much as digits as its factorization.

20430340000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145968 (or 145945 counting only the distinct ones).

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

Adding to 20430340000 its reverse (4303402), we get a palindrome (20434643402).

The spelling of 20430340000 in words is "twenty billion, four hundred thirty million, three hundred forty thousand".