20247075 has 54 divisors (see below), whose sum is σ = 37909404. Its totient is φ = 10328640.

The previous prime is 20247067. The next prime is 20247079. The reversal of 20247075 is 57074202.

It is not a de Polignac number, because 20247075 - 2³ = 20247067 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20247079) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 189172 + ... + 189278.

It is an arithmetic number, because the mean of its divisors is an integer number (702026).

Almost surely, 2^20247075 is an apocalyptic number.

20247075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20247075 is a deficient number, since it is larger than the sum of its proper divisors (17662329).

20247075 is a wasteful number, since it uses less digits than its factorization.

20247075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20247075 is about 4499.6749882630. The cubic root of 20247075 is about 272.5549646442.

The spelling of 20247075 in words is "twenty million, two hundred forty-seven thousand, seventy-five".