20181079 has 2 divisors, whose sum is σ = 20181080. Its totient is φ = 20181078.

The previous prime is 20181053. The next prime is 20181121. The reversal of 20181079 is 97018102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20181079 - 2⁵ = 20181047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20181019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10090539 + 10090540.

It is an arithmetic number, because the mean of its divisors is an integer number (10090540).

Almost surely, 2^20181079 is an apocalyptic number.

20181079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20181079 is an equidigital number, since it uses as much as digits as its factorization.

20181079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 20181079 is about 4492.3355840810. The cubic root of 20181079 is about 272.2585083812.

The spelling of 20181079 in words is "twenty million, one hundred eighty-one thousand, seventy-nine".