20779411 has 2 divisors, whose sum is σ = 20779412. Its totient is φ = 20779410.

The previous prime is 20779397. The next prime is 20779427. The reversal of 20779411 is 11497702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20779411 - 2¹¹ = 20777363 is a prime.

It is a Chen prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (20779441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10389705 + 10389706.

It is an arithmetic number, because the mean of its divisors is an integer number (10389706).

Almost surely, 2^20779411 is an apocalyptic number.

20779411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20779411 is an equidigital number, since it uses as much as digits as its factorization.

20779411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 20779411 is about 4558.4439230948. The cubic root of 20779411 is about 274.9230021347.

The spelling of 20779411 in words is "twenty million, seven hundred seventy-nine thousand, four hundred eleven".