20348516677 has 2 divisors, whose sum is σ = 20348516678. Its totient is φ = 20348516676.

The previous prime is 20348516663. The next prime is 20348516687. The reversal of 20348516677 is 77661584302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16119095521 + 4229421156 = 126961^2 + 65034^2 .

It is a cyclic number.

It is not a de Polignac number, because 20348516677 - 2¹¹ = 20348514629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20348516677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20348516627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10174258338 + 10174258339.

It is an arithmetic number, because the mean of its divisors is an integer number (10174258339).

Almost surely, 2^20348516677 is an apocalyptic number.

It is an amenable number.

20348516677 is a deficient number, since it is larger than the sum of its proper divisors (1).

20348516677 is an equidigital number, since it uses as much as digits as its factorization.

20348516677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 20348516677 in words is "twenty billion, three hundred forty-eight million, five hundred sixteen thousand, six hundred seventy-seven".