20200247 has 4 divisors (see below), whose sum is σ = 20272416. Its totient is φ = 20128080.

The previous prime is 20200237. The next prime is 20200253. The reversal of 20200247 is 74200202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74200202 = 2 ⋅37100101.

It is a cyclic number.

It is not a de Polignac number, because 20200247 - 2¹⁶ = 20134711 is a prime.

It is a super-2 number, since 2×20200247² = 816099957722018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200237) 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, 35663 + ... + 36224.

It is an arithmetic number, because the mean of its divisors is an integer number (5068104).

Almost surely, 2^20200247 is an apocalyptic number.

20200247 is a deficient number, since it is larger than the sum of its proper divisors (72169).

20200247 is an equidigital number, since it uses as much as digits as its factorization.

20200247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72168.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 20200247 is about 4494.4684891542. The cubic root of 20200247 is about 272.3446781996.

Adding to 20200247 its reverse (74200202), we get a palindrome (94400449).

The spelling of 20200247 in words is "twenty million, two hundred thousand, two hundred forty-seven".