20678383277 has 2 divisors, whose sum is σ = 20678383278. Its totient is φ = 20678383276.

The previous prime is 20678383237. The next prime is 20678383321. The reversal of 20678383277 is 77238387602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10752445636 + 9925937641 = 103694^2 + 99629^2 .

It is a cyclic number.

It is not a de Polignac number, because 20678383277 - 2²⁴ = 20661606061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20678383217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10339191638 + 10339191639.

It is an arithmetic number, because the mean of its divisors is an integer number (10339191639).

Almost surely, 2^20678383277 is an apocalyptic number.

It is an amenable number.

20678383277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20678383277 is an equidigital number, since it uses as much as digits as its factorization.

20678383277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 53.

The spelling of 20678383277 in words is "twenty billion, six hundred seventy-eight million, three hundred eighty-three thousand, two hundred seventy-seven".