20020203311 has 4 divisors (see below), whose sum is σ = 20020823592. Its totient is φ = 20019583032.

The previous prime is 20020203293. The next prime is 20020203317. The reversal of 20020203311 is 11330202002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020203311 is a prime.

It is a super-2 number, since 2×20020203311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020203317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258905 + ... + 327218.

It is an arithmetic number, because the mean of its divisors is an integer number (5005205898).

Almost surely, 2^20020203311 is an apocalyptic number.

20020203311 is a deficient number, since it is larger than the sum of its proper divisors (620281).

20020203311 is an equidigital number, since it uses as much as digits as its factorization.

20020203311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620280.

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

Adding to 20020203311 its reverse (11330202002), we get a palindrome (31350405313).

The spelling of 20020203311 in words is "twenty billion, twenty million, two hundred three thousand, three hundred eleven".