20318345 has 8 divisors (see below), whose sum is σ = 24842376. Its totient is φ = 15947776.

The previous prime is 20318339. The next prime is 20318371. The reversal of 20318345 is 54381302.

It can be written as a sum of positive squares in 4 ways, for example, as 506944 + 19811401 = 712^2 + 4451^2 .

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 20318345 - 2¹⁶ = 20252809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38072 + ... + 38601.

It is an arithmetic number, because the mean of its divisors is an integer number (3105297).

Almost surely, 2^20318345 is an apocalyptic number.

It is an amenable number.

20318345 is a deficient number, since it is larger than the sum of its proper divisors (4524031).

20318345 is an equidigital number, since it uses as much as digits as its factorization.

20318345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76731.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20318345 is about 4507.5874922180. The cubic root of 20318345 is about 272.8743892971.

Adding to 20318345 its reverse (54381302), we get a palindrome (74699647).

The spelling of 20318345 in words is "twenty million, three hundred eighteen thousand, three hundred forty-five".