20330013 has 16 divisors (see below), whose sum is σ = 30260736. Its totient is φ = 12033840.

The previous prime is 20329993. The next prime is 20330047. The reversal of 20330013 is 31003302.

It is a happy number.

It is not a de Polignac number, because 20330013 - 2¹⁶ = 20264477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330083) 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 15 ways as a sum of consecutive naturals, for example, 5745 + ... + 8582.

It is an arithmetic number, because the mean of its divisors is an integer number (1891296).

Almost surely, 2^20330013 is an apocalyptic number.

It is an amenable number.

20330013 is a deficient number, since it is larger than the sum of its proper divisors (9930723).

20330013 is a wasteful number, since it uses less digits than its factorization.

20330013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14384.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 20330013 is about 4508.8815686376. The cubic root of 20330013 is about 272.9266128600.

Adding to 20330013 its reverse (31003302), we get a palindrome (51333315).

Subtracting 20330013 from its reverse (31003302), we obtain a square (10673289 = 3267²).

It can be divided in two parts, 20 and 330013, that added together give a palindrome (330033).

The spelling of 20330013 in words is "twenty million, three hundred thirty thousand, thirteen".