20420312303 has 8 divisors (see below), whose sum is σ = 20608573680. Its totient is φ = 20232875520.

The previous prime is 20420312267. The next prime is 20420312317. The reversal of 20420312303 is 30321302402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20420312303 - 2⁸ = 20420312047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420312383) 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, 156338 + ... + 255503.

It is an arithmetic number, because the mean of its divisors is an integer number (2576071710).

Almost surely, 2^20420312303 is an apocalyptic number.

20420312303 is a deficient number, since it is larger than the sum of its proper divisors (188261377).

20420312303 is a wasteful number, since it uses less digits than its factorization.

20420312303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412297.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20420312303 its reverse (30321302402), we get a palindrome (50741614705).

Subtracting 20420312303 from its reverse (30321302402), we obtain a palindrome (9900990099).

The spelling of 20420312303 in words is "twenty billion, four hundred twenty million, three hundred twelve thousand, three hundred three".