2011023 has 24 divisors (see below), whose sum is σ = 3358368. Its totient is φ = 1135872.

The previous prime is 2011021. The next prime is 2011027. The reversal of 2011023 is 3201102.

It is a happy number.

It is not a de Polignac number, because 2011023 - 2¹ = 2011021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2010996 and 2011014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8515 + ... + 8747.

It is an arithmetic number, because the mean of its divisors is an integer number (139932).

2^2011023 is an apocalyptic number.

2011023 is a deficient number, since it is larger than the sum of its proper divisors (1347345).

2011023 is a wasteful number, since it uses less digits than its factorization.

2011023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 380 counting only the distinct ones).

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

The square root of 2011023 is about 1418.1054262642. The cubic root of 2011023 is about 126.2231495361.

Adding to 2011023 its reverse (3201102), we get a palindrome (5212125).

It can be divided in two parts, 201102 and 3, that multiplied together give a palindrome (603306).

The spelling of 2011023 in words is "two million, eleven thousand, twenty-three".