20440223311 has 2 divisors, whose sum is σ = 20440223312. Its totient is φ = 20440223310.

The previous prime is 20440223291. The next prime is 20440223327. The reversal of 20440223311 is 11332204402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20440223311 - 2¹⁹ = 20439699023 is a prime.

It is a super-3 number, since 3×20440223311³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440223611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220111655 + 10220111656.

It is an arithmetic number, because the mean of its divisors is an integer number (10220111656).

Almost surely, 2^20440223311 is an apocalyptic number.

20440223311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440223311 is an equidigital number, since it uses as much as digits as its factorization.

20440223311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20440223311 its reverse (11332204402), we get a palindrome (31772427713).

The spelling of 20440223311 in words is "twenty billion, four hundred forty million, two hundred twenty-three thousand, three hundred eleven".