20003450340 has 24 divisors (see below), whose sum is σ = 56009661120. Its totient is φ = 5334253408.

The previous prime is 20003450303. The next prime is 20003450347. The reversal of 20003450340 is 4305430002.

It is a happy number.

It is a super-2 number, since 2×20003450340² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20003450347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166695360 + ... + 166695479.

It is an arithmetic number, because the mean of its divisors is an integer number (2333735880).

Almost surely, 2^20003450340 is an apocalyptic number.

20003450340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20003450340 is an abundant number, since it is smaller than the sum of its proper divisors (36006210780).

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

20003450340 is a wasteful number, since it uses less digits than its factorization.

20003450340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333390851 (or 333390849 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

Adding to 20003450340 its reverse (4305430002), we get a palindrome (24308880342).

The spelling of 20003450340 in words is "twenty billion, three million, four hundred fifty thousand, three hundred forty".