20013023 has 16 divisors (see below), whose sum is σ = 21880320. Its totient is φ = 18242496.

The previous prime is 20012999. The next prime is 20013031. The reversal of 20013023 is 32031002.

It is a cyclic number.

It is not a de Polignac number, because 20013023 - 2⁸ = 20012767 is a prime.

It is a super-3 number, since 3×20013023³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012995 and 20013013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65036 + ... + 65342.

It is an arithmetic number, because the mean of its divisors is an integer number (1367520).

Almost surely, 2^20013023 is an apocalyptic number.

20013023 is a deficient number, since it is larger than the sum of its proper divisors (1867297).

20013023 is a wasteful number, since it uses less digits than its factorization.

20013023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20013023 is about 4473.5917337191. The cubic root of 20013023 is about 271.5006653107.

Adding to 20013023 its reverse (32031002), we get a palindrome (52044025).

The spelling of 20013023 in words is "twenty million, thirteen thousand, twenty-three".