20424009791 has 2 divisors, whose sum is σ = 20424009792. Its totient is φ = 20424009790.

The previous prime is 20424009787. The next prime is 20424009841. The reversal of 20424009791 is 19790042402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20424009791 - 2² = 20424009787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424009391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212004895 + 10212004896.

It is an arithmetic number, because the mean of its divisors is an integer number (10212004896).

Almost surely, 2^20424009791 is an apocalyptic number.

20424009791 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424009791 is an equidigital number, since it uses as much as digits as its factorization.

20424009791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 20424009791 in words is "twenty billion, four hundred twenty-four million, nine thousand, seven hundred ninety-one".