20302345 has 16 divisors (see below), whose sum is σ = 27998208. Its totient is φ = 13844160.

The previous prime is 20302327. The next prime is 20302361. The reversal of 20302345 is 54320302.

It is a de Polignac number, because none of the positive numbers 2^k-20302345 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5167 + ... + 8203.

It is an arithmetic number, because the mean of its divisors is an integer number (1749888).

Almost surely, 2^20302345 is an apocalyptic number.

It is an amenable number.

20302345 is a deficient number, since it is larger than the sum of its proper divisors (7695863).

20302345 is a wasteful number, since it uses less digits than its factorization.

20302345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20302345 is about 4505.8123573891. The cubic root of 20302345 is about 272.8027440793.

Adding to 20302345 its reverse (54320302), we get a palindrome (74622647).

The spelling of 20302345 in words is "twenty million, three hundred two thousand, three hundred forty-five".