20422123 has 4 divisors (see below), whose sum is σ = 20477248. Its totient is φ = 20367000.

The previous prime is 20422121. The next prime is 20422133. The reversal of 20422123 is 32122402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20422123 - 2¹ = 20422121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20422097 and 20422106.

It is not an unprimeable number, because it can be changed into a prime (20422121) 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 3 ways as a sum of consecutive naturals, for example, 27003 + ... + 27748.

It is an arithmetic number, because the mean of its divisors is an integer number (5119312).

Almost surely, 2^20422123 is an apocalyptic number.

20422123 is a deficient number, since it is larger than the sum of its proper divisors (55125).

20422123 is an equidigital number, since it uses as much as digits as its factorization.

20422123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55124.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20422123 is about 4519.0843099017. The cubic root of 20422123 is about 273.3381784124.

Adding to 20422123 its reverse (32122402), we get a palindrome (52544525).

The spelling of 20422123 in words is "twenty million, four hundred twenty-two thousand, one hundred twenty-three".