20986079 has 2 divisors, whose sum is σ = 20986080. Its totient is φ = 20986078.

The previous prime is 20986057. The next prime is 20986093. The reversal of 20986079 is 97068902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20986079 - 2²⁰ = 19937503 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 (20982079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10493039 + 10493040.

It is an arithmetic number, because the mean of its divisors is an integer number (10493040).

Almost surely, 2^20986079 is an apocalyptic number.

20986079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20986079 is an equidigital number, since it uses as much as digits as its factorization.

20986079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 20986079 is about 4581.0565375249. The cubic root of 20986079 is about 275.8314406963.

The spelling of 20986079 in words is "twenty million, nine hundred eighty-six thousand, seventy-nine".