20072355612769 has 2 divisors, whose sum is σ = 20072355612770. Its totient is φ = 20072355612768.

The previous prime is 20072355612763. The next prime is 20072355612779. The reversal of 20072355612769 is 96721655327002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19957769977744 + 114585635025 = 4467412^2 + 338505^2 .

It is a cyclic number.

It is not a de Polignac number, because 20072355612769 - 2³¹ = 20070208129121 is a prime.

It is a super-2 number, since 2×20072355612769² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20072355612763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036177806384 + 10036177806385.

It is an arithmetic number, because the mean of its divisors is an integer number (10036177806385).

Almost surely, 2^{20072355612769} is an apocalyptic number.

It is an amenable number.

20072355612769 is a deficient number, since it is larger than the sum of its proper divisors (1).

20072355612769 is an equidigital number, since it uses as much as digits as its factorization.

20072355612769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 20072355612769 in words is "twenty trillion, seventy-two billion, three hundred fifty-five million, six hundred twelve thousand, seven hundred sixty-nine".