20424424847 has 2 divisors, whose sum is σ = 20424424848. Its totient is φ = 20424424846.

The previous prime is 20424424843. The next prime is 20424424849. The reversal of 20424424847 is 74842442402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20424424847 - 2² = 20424424843 is a prime.

Together with 20424424849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424424843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212212423 + 10212212424.

It is an arithmetic number, because the mean of its divisors is an integer number (10212212424).

Almost surely, 2^20424424847 is an apocalyptic number.

20424424847 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424424847 is an equidigital number, since it uses as much as digits as its factorization.

20424424847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 458752, while the sum is 41.

The spelling of 20424424847 in words is "twenty billion, four hundred twenty-four million, four hundred twenty-four thousand, eight hundred forty-seven".