20318123 has 8 divisors (see below), whose sum is σ = 23438592. Its totient is φ = 17252136.

The previous prime is 20318119. The next prime is 20318149. The reversal of 20318123 is 32181302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20318123 - 2² = 20318119 is a prime.

It is a super-2 number, since 2×20318123² = 825652244486258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20318095 and 20318104.

It is not an unprimeable number, because it can be changed into a prime (20318153) 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 7 ways as a sum of consecutive naturals, for example, 12815 + ... + 14312.

It is an arithmetic number, because the mean of its divisors is an integer number (2929824).

Almost surely, 2^20318123 is an apocalyptic number.

20318123 is a deficient number, since it is larger than the sum of its proper divisors (3120469).

20318123 is a wasteful number, since it uses less digits than its factorization.

20318123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27241.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20318123 is about 4507.5628670047. The cubic root of 20318123 is about 272.8733954770.

Adding to 20318123 its reverse (32181302), we get a palindrome (52499425).

The spelling of 20318123 in words is "twenty million, three hundred eighteen thousand, one hundred twenty-three".