20424283 has 4 divisors (see below), whose sum is σ = 22281048. Its totient is φ = 18567520.

The previous prime is 20424277. The next prime is 20424301. The reversal of 20424283 is 38242402.

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 20424283 - 2⁹ = 20423771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928366 + ... + 928387.

It is an arithmetic number, because the mean of its divisors is an integer number (5570262).

Almost surely, 2^20424283 is an apocalyptic number.

20424283 is a deficient number, since it is larger than the sum of its proper divisors (1856765).

20424283 is a wasteful number, since it uses less digits than its factorization.

20424283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856764.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 20424283 is about 4519.3232900513. The cubic root of 20424283 is about 273.3478148517.

Adding to 20424283 its reverse (38242402), we get a palindrome (58666685).

The spelling of 20424283 in words is "twenty million, four hundred twenty-four thousand, two hundred eighty-three".