20210420303 has 2 divisors, whose sum is σ = 20210420304. Its totient is φ = 20210420302.

The previous prime is 20210420291. The next prime is 20210420309. The reversal of 20210420303 is 30302401202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20210420303 - 2¹⁸ = 20210158159 is a prime.

It is a super-2 number, since 2×20210420303² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210420309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105210151 + 10105210152.

It is an arithmetic number, because the mean of its divisors is an integer number (10105210152).

Almost surely, 2^20210420303 is an apocalyptic number.

20210420303 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210420303 is an equidigital number, since it uses as much as digits as its factorization.

20210420303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20210420303 its reverse (30302401202), we get a palindrome (50512821505).

The spelling of 20210420303 in words is "twenty billion, two hundred ten million, four hundred twenty thousand, three hundred three".