20111433311 has 2 divisors, whose sum is σ = 20111433312. Its totient is φ = 20111433310.

The previous prime is 20111433299. The next prime is 20111433373. The reversal of 20111433311 is 11333411102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20111433311 - 2³⁰ = 19037691487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111436311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055716655 + 10055716656.

It is an arithmetic number, because the mean of its divisors is an integer number (10055716656).

Almost surely, 2^20111433311 is an apocalyptic number.

20111433311 is the 63422-nd centered decagonal number.

20111433311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111433311 is an equidigital number, since it uses as much as digits as its factorization.

20111433311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20111433311 its reverse (11333411102), we get a palindrome (31444844413).

The spelling of 20111433311 in words is "twenty billion, one hundred eleven million, four hundred thirty-three thousand, three hundred eleven".