20385345 has 8 divisors (see below), whose sum is σ = 32616576. Its totient is φ = 10872176.

The previous prime is 20385341. The next prime is 20385349. The reversal of 20385345 is 54358302.

It is an interprime number because it is at equal distance from previous prime (20385341) and next prime (20385349).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20385345 - 2² = 20385341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20385341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679497 + ... + 679526.

It is an arithmetic number, because the mean of its divisors is an integer number (4077072).

Almost surely, 2^20385345 is an apocalyptic number.

It is an amenable number.

20385345 is a deficient number, since it is larger than the sum of its proper divisors (12231231).

20385345 is a wasteful number, since it uses less digits than its factorization.

20385345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359031.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 20385345 is about 4515.0132890170. The cubic root of 20385345 is about 273.1739958042.

The spelling of 20385345 in words is "twenty million, three hundred eighty-five thousand, three hundred forty-five".