20424009841 has 2 divisors, whose sum is σ = 20424009842. Its totient is φ = 20424009840.

The previous prime is 20424009791. The next prime is 20424009863. The reversal of 20424009841 is 14890042402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14170521600 + 6253488241 = 119040^2 + 79079^2 .

It is a cyclic number.

It is not a de Polignac number, because 20424009841 - 2³³ = 11834075249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20424009797 and 20424009806.

It is not a weakly prime, because it can be changed into another prime (20424009041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212004920 + 10212004921.

It is an arithmetic number, because the mean of its divisors is an integer number (10212004921).

Almost surely, 2^20424009841 is an apocalyptic number.

It is an amenable number.

20424009841 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424009841 is an equidigital number, since it uses as much as digits as its factorization.

20424009841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 20424009841 in words is "twenty billion, four hundred twenty-four million, nine thousand, eight hundred forty-one".