20070779 has 2 divisors, whose sum is σ = 20070780. Its totient is φ = 20070778.

The previous prime is 20070773. The next prime is 20070781. The reversal of 20070779 is 97707002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20070779 - 2⁴ = 20070763 is a prime.

Together with 20070781, 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 (20070773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035389 + 10035390.

It is an arithmetic number, because the mean of its divisors is an integer number (10035390).

Almost surely, 2^20070779 is an apocalyptic number.

20070779 is a deficient number, since it is larger than the sum of its proper divisors (1).

20070779 is an equidigital number, since it uses as much as digits as its factorization.

20070779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 20070779 is about 4480.0422989075. The cubic root of 20070779 is about 271.7615909432.

The spelling of 20070779 in words is "twenty million, seventy thousand, seven hundred seventy-nine".