20011000011023 has 48 divisors (see below), whose sum is σ = 23461261680384. Its totient is φ = 17017883205120.

The previous prime is 20011000011011. The next prime is 20011000011047. The reversal of 20011000011023 is 32011000011002.

It is not a de Polignac number, because 20011000011023 - 2²² = 20010995816719 is a prime.

It is a super-2 number, since 2×20011000011023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011000010995 and 20011000011013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011000011073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8091790115 + ... + 8091792587.

It is an arithmetic number, because the mean of its divisors is an integer number (488776285008).

Almost surely, 2^{20011000011023} is an apocalyptic number.

20011000011023 is a deficient number, since it is larger than the sum of its proper divisors (3450261669361).

20011000011023 is a wasteful number, since it uses less digits than its factorization.

20011000011023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4672 (or 4665 counting only the distinct ones).

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

Adding to 20011000011023 its reverse (32011000011002), we get a palindrome (52022000022025).

The spelling of 20011000011023 in words is "twenty trillion, eleven billion, eleven thousand, twenty-three".