20302247 has 8 divisors (see below), whose sum is σ = 23258496. Its totient is φ = 17359992.

The previous prime is 20302223. The next prime is 20302259. The reversal of 20302247 is 74220302.

It is a happy number.

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 20302247 - 2⁸ = 20301991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173 + ... + 6374.

It is an arithmetic number, because the mean of its divisors is an integer number (2907312).

Almost surely, 2^20302247 is an apocalyptic number.

20302247 is a deficient number, since it is larger than the sum of its proper divisors (2956249).

20302247 is an equidigital number, since it uses as much as digits as its factorization.

20302247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6997.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20302247 is about 4505.8014825334. The cubic root of 20302247 is about 272.8023051364.

Adding to 20302247 its reverse (74220302), we get a palindrome (94522549).

The spelling of 20302247 in words is "twenty million, three hundred two thousand, two hundred forty-seven".