20020311111 has 16 divisors (see below), whose sum is σ = 27595703520. Its totient is φ = 12901870080.

The previous prime is 20020311079. The next prime is 20020311119. The reversal of 20020311111 is 11111302002.

It is not a de Polignac number, because 20020311111 - 2⁵ = 20020311079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020311119) 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 15 ways as a sum of consecutive naturals, for example, 733230 + ... + 760043.

It is an arithmetic number, because the mean of its divisors is an integer number (1724731470).

Almost surely, 2^20020311111 is an apocalyptic number.

20020311111 is a deficient number, since it is larger than the sum of its proper divisors (7575392409).

20020311111 is a wasteful number, since it uses less digits than its factorization.

20020311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493426.

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

Adding to 20020311111 its reverse (11111302002), we get a palindrome (31131613113).

The spelling of 20020311111 in words is "twenty billion, twenty million, three hundred eleven thousand, one hundred eleven".