20411023010511 has 96 divisors (see below), whose sum is σ = 33261683133952. Its totient is φ = 10903746078720.

The previous prime is 20411023010489. The next prime is 20411023010531. The reversal of 20411023010511 is 11501032011402.

It is not a de Polignac number, because 20411023010511 - 2¹⁹ = 20411022486223 is a prime.

It is a super-2 number, since 2×20411023010511² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411023010531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 963364260 + ... + 963385446.

Almost surely, 2^{20411023010511} is an apocalyptic number.

20411023010511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20411023010511 is a deficient number, since it is larger than the sum of its proper divisors (12850660123441).

20411023010511 is a wasteful number, since it uses less digits than its factorization.

20411023010511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22289 (or 22272 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 20411023010511 its reverse (11501032011402), we get a palindrome (31912055021913).

The spelling of 20411023010511 in words is "twenty trillion, four hundred eleven billion, twenty-three million, ten thousand, five hundred eleven".