20305203430 has 16 divisors (see below), whose sum is σ = 36884683440. Its totient is φ = 8047566432.

The previous prime is 20305203409. The next prime is 20305203433. The reversal of 20305203430 is 3430250302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305203433) 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, 9313224 + ... + 9315403.

It is an arithmetic number, because the mean of its divisors is an integer number (2305292715).

Almost surely, 2^20305203430 is an apocalyptic number.

20305203430 is a deficient number, since it is larger than the sum of its proper divisors (16579480010).

20305203430 is a wasteful number, since it uses less digits than its factorization.

20305203430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18628743.

The product of its (nonzero) digits is 2160, while the sum is 22.

Adding to 20305203430 its reverse (3430250302), we get a palindrome (23735453732).

The spelling of 20305203430 in words is "twenty billion, three hundred five million, two hundred three thousand, four hundred thirty".