20761266070157 has 2 divisors, whose sum is σ = 20761266070158. Its totient is φ = 20761266070156.

The previous prime is 20761266070091. The next prime is 20761266070177. The reversal of 20761266070157 is 75107066216702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19249463031241 + 1511803038916 = 4387421^2 + 1229554^2 .

It is a cyclic number.

It is not a de Polignac number, because 20761266070157 - 2¹⁸ = 20761265808013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20761266070177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10380633035078 + 10380633035079.

It is an arithmetic number, because the mean of its divisors is an integer number (10380633035079).

Almost surely, 2^{20761266070157} is an apocalyptic number.

It is an amenable number.

20761266070157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20761266070157 is an equidigital number, since it uses as much as digits as its factorization.

20761266070157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The spelling of 20761266070157 in words is "twenty trillion, seven hundred sixty-one billion, two hundred sixty-six million, seventy thousand, one hundred fifty-seven".