20072355612779 has 2 divisors, whose sum is σ = 20072355612780. Its totient is φ = 20072355612778.

The previous prime is 20072355612769. The next prime is 20072355612781. The reversal of 20072355612779 is 97721655327002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20072355612779 - 2⁴ = 20072355612763 is a prime.

Together with 20072355612781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20072355612769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036177806389 + 10036177806390.

It is an arithmetic number, because the mean of its divisors is an integer number (10036177806390).

Almost surely, 2^{20072355612779} is an apocalyptic number.

20072355612779 is a deficient number, since it is larger than the sum of its proper divisors (1).

20072355612779 is an equidigital number, since it uses as much as digits as its factorization.

20072355612779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11113200, while the sum is 56.

The spelling of 20072355612779 in words is "twenty trillion, seventy-two billion, three hundred fifty-five million, six hundred twelve thousand, seven hundred seventy-nine".