20848247 has 4 divisors (see below), whose sum is σ = 23826576. Its totient is φ = 17869920.

The previous prime is 20848241. The next prime is 20848253. The reversal of 20848247 is 74284802.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20848241) and next prime (20848253).

It is a cyclic number.

It is not a de Polignac number, because 20848247 - 2⁴ = 20848231 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 (20848241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489154 + ... + 1489167.

It is an arithmetic number, because the mean of its divisors is an integer number (5956644).

Almost surely, 2^20848247 is an apocalyptic number.

20848247 is a deficient number, since it is larger than the sum of its proper divisors (2978329).

20848247 is an equidigital number, since it uses as much as digits as its factorization.

20848247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978328.

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 20848247 is about 4565.9880639353. The cubic root of 20848247 is about 275.2262468699.

The spelling of 20848247 in words is "twenty million, eight hundred forty-eight thousand, two hundred forty-seven".