20310021203 has 2 divisors, whose sum is σ = 20310021204. Its totient is φ = 20310021202.

The previous prime is 20310021161. The next prime is 20310021239. The reversal of 20310021203 is 30212001302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20310021203 - 2¹⁰ = 20310020179 is a prime.

It is a super-2 number, since 2×20310021203² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20310029203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155010601 + 10155010602.

It is an arithmetic number, because the mean of its divisors is an integer number (10155010602).

Almost surely, 2^20310021203 is an apocalyptic number.

20310021203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310021203 is an equidigital number, since it uses as much as digits as its factorization.

20310021203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20310021203 its reverse (30212001302), we get a palindrome (50522022505).

The spelling of 20310021203 in words is "twenty billion, three hundred ten million, twenty-one thousand, two hundred three".