30420338477 has 2 divisors, whose sum is σ = 30420338478. Its totient is φ = 30420338476.

The previous prime is 30420338449. The next prime is 30420338491. The reversal of 30420338477 is 77483302403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19652955721 + 10767382756 = 140189^2 + 103766^2 .

It is a cyclic number.

It is not a de Polignac number, because 30420338477 - 2¹² = 30420334381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30420338497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210169238 + 15210169239.

It is an arithmetic number, because the mean of its divisors is an integer number (15210169239).

Almost surely, 2^30420338477 is an apocalyptic number.

It is an amenable number.

30420338477 is a deficient number, since it is larger than the sum of its proper divisors (1).

30420338477 is an equidigital number, since it uses as much as digits as its factorization.

30420338477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 41.

The spelling of 30420338477 in words is "thirty billion, four hundred twenty million, three hundred thirty-eight thousand, four hundred seventy-seven".