16420423 has 2 divisors, whose sum is σ = 16420424. Its totient is φ = 16420422.

The previous prime is 16420403. The next prime is 16420433. The reversal of 16420423 is 32402461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16420423 - 2⁹ = 16419911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16420394 and 16420403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16420403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8210211 + 8210212.

It is an arithmetic number, because the mean of its divisors is an integer number (8210212).

Almost surely, 2^16420423 is an apocalyptic number.

16420423 is a deficient number, since it is larger than the sum of its proper divisors (1).

16420423 is an equidigital number, since it uses as much as digits as its factorization.

16420423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 16420423 is about 4052.2121119211. The cubic root of 16420423 is about 254.1722383562.

Adding to 16420423 its reverse (32402461), we get a palindrome (48822884).

The spelling of 16420423 in words is "sixteen million, four hundred twenty thousand, four hundred twenty-three".