20030047 has 4 divisors (see below), whose sum is σ = 21084280. Its totient is φ = 18975816.

The previous prime is 20030027. The next prime is 20030053. The reversal of 20030047 is 74003002.

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

It is a cyclic number.

It is not a de Polignac number, because 20030047 - 2¹¹ = 20027999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20030047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527088 + ... + 527125.

It is an arithmetic number, because the mean of its divisors is an integer number (5271070).

Almost surely, 2^20030047 is an apocalyptic number.

20030047 is a deficient number, since it is larger than the sum of its proper divisors (1054233).

20030047 is a wasteful number, since it uses less digits than its factorization.

20030047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054232.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20030047 is about 4475.4940509401. The cubic root of 20030047 is about 271.5776271532.

Adding to 20030047 its reverse (74003002), we get a palindrome (94033049).

The spelling of 20030047 in words is "twenty million, thirty thousand, forty-seven".