20247273 has 8 divisors (see below), whose sum is σ = 29996000. Its totient is φ = 13498164.

The previous prime is 20247263. The next prime is 20247301. The reversal of 20247273 is 37274202.

It is not a de Polignac number, because 20247273 - 2⁴ = 20247257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 749899 = 20247273 / (2 + 0 + 2 + 4 + 7 + 2 + 7 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20247263) 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, 374923 + ... + 374976.

It is an arithmetic number, because the mean of its divisors is an integer number (3749500).

Almost surely, 2^20247273 is an apocalyptic number.

It is an amenable number.

20247273 is a deficient number, since it is larger than the sum of its proper divisors (9748727).

20247273 is an equidigital number, since it uses as much as digits as its factorization.

20247273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749908 (or 749902 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20247273 is about 4499.6969897983. The cubic root of 20247273 is about 272.5558530969. Note that the first 3 decimals are identical.

The spelling of 20247273 in words is "twenty million, two hundred forty-seven thousand, two hundred seventy-three".