20312303203 has 4 divisors (see below), whose sum is σ = 20313028008. Its totient is φ = 20311578400.

The previous prime is 20312303201. The next prime is 20312303251. The reversal of 20312303203 is 30230321302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20312303203 - 2¹ = 20312303201 is a prime.

It is a super-2 number, since 2×20312303203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312303201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318601 + ... + 377002.

It is an arithmetic number, because the mean of its divisors is an integer number (5078257002).

Almost surely, 2^20312303203 is an apocalyptic number.

20312303203 is a deficient number, since it is larger than the sum of its proper divisors (724805).

20312303203 is an equidigital number, since it uses as much as digits as its factorization.

20312303203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724804.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20312303203 its reverse (30230321302), we get a palindrome (50542624505).

The spelling of 20312303203 in words is "twenty billion, three hundred twelve million, three hundred three thousand, two hundred three".