20030247 has 24 divisors (see below), whose sum is σ = 30983680. Its totient is φ = 12917880.

The previous prime is 20030239. The next prime is 20030261. The reversal of 20030247 is 74203002.

It is a happy number.

It is not a de Polignac number, because 20030247 - 2³ = 20030239 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 (20030207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6204 + ... + 8862.

Almost surely, 2^20030247 is an apocalyptic number.

20030247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20030247 is a deficient number, since it is larger than the sum of its proper divisors (10953433).

20030247 is an equidigital number, since it uses as much as digits as its factorization.

20030247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20030247 is about 4475.5163947862. The cubic root of 20030247 is about 271.5785310510.

Adding to 20030247 its reverse (74203002), we get a palindrome (94233249).

The spelling of 20030247 in words is "twenty million, thirty thousand, two hundred forty-seven".