20123123 has 8 divisors (see below), whose sum is σ = 20823936. Its totient is φ = 19425600.

The previous prime is 20123119. The next prime is 20123141. The reversal of 20123123 is 32132102.

It is a happy number.

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 20123123 - 2² = 20123119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123098 and 20123107.

It is not an unprimeable number, because it can be changed into a prime (20123143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23165 + ... + 24017.

It is an arithmetic number, because the mean of its divisors is an integer number (2602992).

Almost surely, 2^20123123 is an apocalyptic number.

20123123 is a deficient number, since it is larger than the sum of its proper divisors (700813).

20123123 is an equidigital number, since it uses as much as digits as its factorization.

20123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20123123 is about 4485.8804041124. The cubic root of 20123123 is about 271.9976346031.

Adding to 20123123 its reverse (32132102), we get a palindrome (52255225).

The spelling of 20123123 in words is "twenty million, one hundred twenty-three thousand, one hundred twenty-three".