20430340002 has 72 divisors (see below), whose sum is σ = 47081332116. Its totient is φ = 6401539584.

The previous prime is 20430340001. The next prime is 20430340003. The reversal of 20430340002 is 20004303402.

It is an interprime number because it is at equal distance from previous prime (20430340001) and next prime (20430340003).

It can be written as a sum of positive squares in 6 ways, for example, as 6171830721 + 14258509281 = 78561^2 + 119409^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5267688 + ... + 5271564.

Almost surely, 2^20430340002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430340002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23540666058).

20430340002 is an abundant number, since it is smaller than the sum of its proper divisors (26650992114).

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

20430340002 is a wasteful number, since it uses less digits than its factorization.

20430340002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932 (or 4912 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 20430340002 its reverse (20004303402), we get a palindrome (40434643404).

The spelling of 20430340002 in words is "twenty billion, four hundred thirty million, three hundred forty thousand, two".