20020110311 has 4 divisors (see below), whose sum is σ = 20030067624. Its totient is φ = 20010153000.

The previous prime is 20020110307. The next prime is 20020110359. The reversal of 20020110311 is 11301102002.

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 20020110311 - 2² = 20020110307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020110292 and 20020110301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020110301) 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, 4975640 + ... + 4979661.

It is an arithmetic number, because the mean of its divisors is an integer number (5007516906).

Almost surely, 2^20020110311 is an apocalyptic number.

20020110311 is a deficient number, since it is larger than the sum of its proper divisors (9957313).

20020110311 is an equidigital number, since it uses as much as digits as its factorization.

20020110311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957312.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20020110311 its reverse (11301102002), we get a palindrome (31321212313).

The spelling of 20020110311 in words is "twenty billion, twenty million, one hundred ten thousand, three hundred eleven".