20378766878707 has 2 divisors, whose sum is σ = 20378766878708. Its totient is φ = 20378766878706.

The previous prime is 20378766878677. The next prime is 20378766878731. The reversal of 20378766878707 is 70787866787302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20378766878707 is a prime.

It is not a weakly prime, because it can be changed into another prime (20378766878777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10189383439353 + 10189383439354.

It is an arithmetic number, because the mean of its divisors is an integer number (10189383439354).

Almost surely, 2^{20378766878707} is an apocalyptic number.

20378766878707 is a deficient number, since it is larger than the sum of its proper divisors (1).

20378766878707 is an equidigital number, since it uses as much as digits as its factorization.

20378766878707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1858719744, while the sum is 76.

The spelling of 20378766878707 in words is "twenty trillion, three hundred seventy-eight billion, seven hundred sixty-six million, eight hundred seventy-eight thousand, seven hundred seven".