20110023 has 6 divisors (see below), whose sum is σ = 29047824. Its totient is φ = 13406676.

The previous prime is 20109989. The next prime is 20110043. The reversal of 20110023 is 32001102.

It is a happy number.

It is not a de Polignac number, because 20110023 - 2¹² = 20105927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2234447 = 20110023 / (2 + 0 + 1 + 1 + 0 + 0 + 2 + 3).

It is a junction number, because it is equal to n+sod(n) for n = 20109987 and 20110014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117215 + ... + 1117232.

It is an arithmetic number, because the mean of its divisors is an integer number (4841304).

Almost surely, 2^20110023 is an apocalyptic number.

20110023 is a deficient number, since it is larger than the sum of its proper divisors (8937801).

20110023 is a wasteful number, since it uses less digits than its factorization.

20110023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234453 (or 2234450 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20110023 is about 4484.4200293906. The cubic root of 20110023 is about 271.9385989937.

Adding to 20110023 its reverse (32001102), we get a palindrome (52111125).

The spelling of 20110023 in words is "twenty million, one hundred ten thousand, twenty-three".