20423113 has 4 divisors (see below), whose sum is σ = 20435920. Its totient is φ = 20410308.

The previous prime is 20423087. The next prime is 20423129. The reversal of 20423113 is 31132402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20423113 - 2⁹ = 20422601 is a prime.

It is a super-2 number, since 2×20423113² = 834207089221538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20423213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3603 + ... + 7336.

It is an arithmetic number, because the mean of its divisors is an integer number (5108980).

Almost surely, 2^20423113 is an apocalyptic number.

It is an amenable number.

20423113 is a deficient number, since it is larger than the sum of its proper divisors (12807).

20423113 is a wasteful number, since it uses less digits than its factorization.

20423113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12806.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20423113 is about 4519.1938440390. The cubic root of 20423113 is about 273.3425951981.

Adding to 20423113 its reverse (31132402), we get a palindrome (51555515).

The spelling of 20423113 in words is "twenty million, four hundred twenty-three thousand, one hundred thirteen".