20548683677 has 2 divisors, whose sum is σ = 20548683678. Its totient is φ = 20548683676.

The previous prime is 20548683629. The next prime is 20548683707. The reversal of 20548683677 is 77638684502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12148227961 + 8400455716 = 110219^2 + 91654^2 .

It is a cyclic number.

It is not a de Polignac number, because 20548683677 - 2¹² = 20548679581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20548683877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10274341838 + 10274341839.

It is an arithmetic number, because the mean of its divisors is an integer number (10274341839).

Almost surely, 2^20548683677 is an apocalyptic number.

It is an amenable number.

20548683677 is a deficient number, since it is larger than the sum of its proper divisors (1).

20548683677 is an equidigital number, since it uses as much as digits as its factorization.

20548683677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 20548683677 in words is "twenty billion, five hundred forty-eight million, six hundred eighty-three thousand, six hundred seventy-seven".