20973179 has 2 divisors, whose sum is σ = 20973180. Its totient is φ = 20973178.

The previous prime is 20973163. The next prime is 20973229. The reversal of 20973179 is 97137902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20973179 - 2⁴ = 20973163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20973109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10486589 + 10486590.

It is an arithmetic number, because the mean of its divisors is an integer number (10486590).

Almost surely, 2^20973179 is an apocalyptic number.

20973179 is a deficient number, since it is larger than the sum of its proper divisors (1).

20973179 is an equidigital number, since it uses as much as digits as its factorization.

20973179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 20973179 is about 4579.6483489456. The cubic root of 20973179 is about 275.7749118754.

The spelling of 20973179 in words is "twenty million, nine hundred seventy-three thousand, one hundred seventy-nine".