20346305 has 8 divisors (see below), whose sum is σ = 27903552. Its totient is φ = 13951728.

The previous prime is 20346301. The next prime is 20346307. The reversal of 20346305 is 50364302.

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

It is not a de Polignac number, because 20346305 - 2² = 20346301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20346301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290627 + ... + 290696.

It is an arithmetic number, because the mean of its divisors is an integer number (3487944).

Almost surely, 2^20346305 is an apocalyptic number.

It is an amenable number.

20346305 is a deficient number, since it is larger than the sum of its proper divisors (7557247).

20346305 is an equidigital number, since it uses as much as digits as its factorization.

20346305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581335.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20346305 is about 4510.6878632865. The cubic root of 20346305 is about 272.9994990755. Note that the first 3 decimals are identical.

The spelling of 20346305 in words is "twenty million, three hundred forty-six thousand, three hundred five".