20185379 has 2 divisors, whose sum is σ = 20185380. Its totient is φ = 20185378.

The previous prime is 20185357. The next prime is 20185381. The reversal of 20185379 is 97358102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20185379 is a prime.

Together with 20185381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20185339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10092689 + 10092690.

It is an arithmetic number, because the mean of its divisors is an integer number (10092690).

Almost surely, 2^20185379 is an apocalyptic number.

20185379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20185379 is an equidigital number, since it uses as much as digits as its factorization.

20185379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 20185379 is about 4492.8141515091. The cubic root of 20185379 is about 272.2778437935.

The spelling of 20185379 in words is "twenty million, one hundred eighty-five thousand, three hundred seventy-nine".