20042343 has 32 divisors (see below), whose sum is σ = 30990080. Its totient is φ = 12791520.

The previous prime is 20042327. The next prime is 20042353. The reversal of 20042343 is 34324002.

20042343 is a `hidden beast` number, since 200 + 423 + 43 = 666.

It is not a de Polignac number, because 20042343 - 2⁴ = 20042327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042353) 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 31 ways as a sum of consecutive naturals, for example, 70680 + ... + 70962.

It is an arithmetic number, because the mean of its divisors is an integer number (968440).

Almost surely, 2^20042343 is an apocalyptic number.

20042343 is a deficient number, since it is larger than the sum of its proper divisors (10947737).

20042343 is a wasteful number, since it uses less digits than its factorization.

20042343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20042343 is about 4476.8675432717. The cubic root of 20042343 is about 271.6331876057.

Adding to 20042343 its reverse (34324002), we get a palindrome (54366345).

The spelling of 20042343 in words is "twenty million, forty-two thousand, three hundred forty-three".