20017379 has 2 divisors, whose sum is σ = 20017380. Its totient is φ = 20017378.

The previous prime is 20017369. The next prime is 20017397. The reversal of 20017379 is 97371002.

It is a happy number.

Together with next prime (20017397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20017379 - 2²⁴ = 3240163 is a prime.

It is not a weakly prime, because it can be changed into another prime (20017369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008689 + 10008690.

It is an arithmetic number, because the mean of its divisors is an integer number (10008690).

Almost surely, 2^20017379 is an apocalyptic number.

20017379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20017379 is an equidigital number, since it uses as much as digits as its factorization.

20017379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 20017379 is about 4474.0785643527. The cubic root of 20017379 is about 271.5203620036.

The spelling of 20017379 in words is "twenty million, seventeen thousand, three hundred seventy-nine".