20042123 has 8 divisors (see below), whose sum is σ = 20934960. Its totient is φ = 19167840.

The previous prime is 20042117. The next prime is 20042173. The reversal of 20042123 is 32124002.

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 20042123 - 2⁴ = 20042107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20042098 and 20042107.

It is not an unprimeable number, because it can be changed into a prime (20042173) 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, 2408 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (2616870).

Almost surely, 2^20042123 is an apocalyptic number.

20042123 is a deficient number, since it is larger than the sum of its proper divisors (892837).

20042123 is an equidigital number, since it uses as much as digits as its factorization.

20042123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9277.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20042123 is about 4476.8429724528. The cubic root of 20042123 is about 271.6321937179.

Adding to 20042123 its reverse (32124002), we get a palindrome (52166125).

The spelling of 20042123 in words is "twenty million, forty-two thousand, one hundred twenty-three".