20488441447 has 2 divisors, whose sum is σ = 20488441448. Its totient is φ = 20488441446.

The previous prime is 20488441417. The next prime is 20488441471. The reversal of 20488441447 is 74414488402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20488441447 - 2¹⁹ = 20487917159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20488441397 and 20488441406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20488441417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244220723 + 10244220724.

It is an arithmetic number, because the mean of its divisors is an integer number (10244220724).

Almost surely, 2^20488441447 is an apocalyptic number.

20488441447 is a deficient number, since it is larger than the sum of its proper divisors (1).

20488441447 is an equidigital number, since it uses as much as digits as its factorization.

20488441447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 917504, while the sum is 46.

The spelling of 20488441447 in words is "twenty billion, four hundred eighty-eight million, four hundred forty-one thousand, four hundred forty-seven".