20484447377 has 2 divisors, whose sum is σ = 20484447378. Its totient is φ = 20484447376.

The previous prime is 20484447367. The next prime is 20484447391. The reversal of 20484447377 is 77374448402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19822105681 + 662341696 = 140791^2 + 25736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20484447377 is a prime.

It is a super-2 number, since 2×20484447377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20484447367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10242223688 + 10242223689.

It is an arithmetic number, because the mean of its divisors is an integer number (10242223689).

Almost surely, 2^20484447377 is an apocalyptic number.

It is an amenable number.

20484447377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20484447377 is an equidigital number, since it uses as much as digits as its factorization.

20484447377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4214784, while the sum is 50.

The spelling of 20484447377 in words is "twenty billion, four hundred eighty-four million, four hundred forty-seven thousand, three hundred seventy-seven".