20424043 has 2 divisors, whose sum is σ = 20424044. Its totient is φ = 20424042.

The previous prime is 20423989. The next prime is 20424049. The reversal of 20424043 is 34042402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20424043 - 2¹³ = 20415851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20424043.

It is not a weakly prime, because it can be changed into another prime (20424049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212021 + 10212022.

It is an arithmetic number, because the mean of its divisors is an integer number (10212022).

Almost surely, 2^20424043 is an apocalyptic number.

20424043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424043 is an equidigital number, since it uses as much as digits as its factorization.

20424043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 20424043 is about 4519.2967373254. The cubic root of 20424043 is about 273.3467441698.

Adding to 20424043 its reverse (34042402), we get a palindrome (54466445).

The spelling of 20424043 in words is "twenty million, four hundred twenty-four thousand, forty-three".