30820780447 has 2 divisors, whose sum is σ = 30820780448. Its totient is φ = 30820780446.

The previous prime is 30820780421. The next prime is 30820780451. The reversal of 30820780447 is 74408702803.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30820780447 - 2²⁷ = 30686562719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30820783447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15410390223 + 15410390224.

It is an arithmetic number, because the mean of its divisors is an integer number (15410390224).

Almost surely, 2^30820780447 is an apocalyptic number.

30820780447 is a deficient number, since it is larger than the sum of its proper divisors (1).

30820780447 is an equidigital number, since it uses as much as digits as its factorization.

30820780447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 30820780447 in words is "thirty billion, eight hundred twenty million, seven hundred eighty thousand, four hundred forty-seven".