20042923 has 8 divisors (see below), whose sum is σ = 20473488. Its totient is φ = 19617024.

The previous prime is 20042917. The next prime is 20042927. The reversal of 20042923 is 32924002.

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 20042923 - 2¹³ = 20034731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20042894 and 20042903.

It is not an unprimeable number, because it can be changed into a prime (20042927) 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 7 ways as a sum of consecutive naturals, for example, 8311 + ... + 10447.

It is an arithmetic number, because the mean of its divisors is an integer number (2559186).

Almost surely, 2^20042923 is an apocalyptic number.

20042923 is a deficient number, since it is larger than the sum of its proper divisors (430565).

20042923 is a wasteful number, since it uses less digits than its factorization.

20042923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20042923 is about 4476.9323202389. The cubic root of 20042923 is about 271.6358078205.

Adding to 20042923 its reverse (32924002), we get a palindrome (52966925).

The spelling of 20042923 in words is "twenty million, forty-two thousand, nine hundred twenty-three".