20758879 has 2 divisors, whose sum is σ = 20758880. Its totient is φ = 20758878.

The previous prime is 20758877. The next prime is 20758883. The reversal of 20758879 is 97885702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20758879 - 2¹ = 20758877 is a prime.

Together with 20758877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20758877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10379439 + 10379440.

It is an arithmetic number, because the mean of its divisors is an integer number (10379440).

Almost surely, 2^20758879 is an apocalyptic number.

20758879 is a deficient number, since it is larger than the sum of its proper divisors (1).

20758879 is an equidigital number, since it uses as much as digits as its factorization.

20758879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 20758879 is about 4556.1912822005. The cubic root of 20758879 is about 274.8324224214.

The spelling of 20758879 in words is "twenty million, seven hundred fifty-eight thousand, eight hundred seventy-nine".