20069697077 has 2 divisors, whose sum is σ = 20069697078. Its totient is φ = 20069697076.

The previous prime is 20069697031. The next prime is 20069697083. The reversal of 20069697077 is 77079696002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19209682801 + 860014276 = 138599^2 + 29326^2 .

It is a cyclic number.

It is not a de Polignac number, because 20069697077 - 2¹⁴ = 20069680693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20069697377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10034848538 + 10034848539.

It is an arithmetic number, because the mean of its divisors is an integer number (10034848539).

Almost surely, 2^20069697077 is an apocalyptic number.

It is an amenable number.

20069697077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20069697077 is an equidigital number, since it uses as much as digits as its factorization.

20069697077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000376, while the sum is 53.

The spelling of 20069697077 in words is "twenty billion, sixty-nine million, six hundred ninety-seven thousand, seventy-seven".