20385479 has 2 divisors, whose sum is σ = 20385480. Its totient is φ = 20385478.

The previous prime is 20385473. The next prime is 20385481. The reversal of 20385479 is 97458302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20385479 - 2⁸ = 20385223 is a prime.

Together with 20385481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20385473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10192739 + 10192740.

It is an arithmetic number, because the mean of its divisors is an integer number (10192740).

Almost surely, 2^20385479 is an apocalyptic number.

20385479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20385479 is an equidigital number, since it uses as much as digits as its factorization.

20385479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 20385479 is about 4515.0281283731. The cubic root of 20385479 is about 273.1745943590.

The spelling of 20385479 in words is "twenty million, three hundred eighty-five thousand, four hundred seventy-nine".