20343013 has 4 divisors (see below), whose sum is σ = 20357280. Its totient is φ = 20328748.

The previous prime is 20342981. The next prime is 20343019. The reversal of 20343013 is 31034302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20343013 - 2⁵ = 20342981 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 (20343019) 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, 4723 + ... + 7936.

It is an arithmetic number, because the mean of its divisors is an integer number (5089320).

Almost surely, 2^20343013 is an apocalyptic number.

It is an amenable number.

20343013 is a deficient number, since it is larger than the sum of its proper divisors (14267).

20343013 is a wasteful number, since it uses less digits than its factorization.

20343013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14266.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20343013 is about 4510.3229374403. The cubic root of 20343013 is about 272.9847746521.

Adding to 20343013 its reverse (31034302), we get a palindrome (51377315).

The spelling of 20343013 in words is "twenty million, three hundred forty-three thousand, thirteen".