20331343 has 4 divisors (see below), whose sum is σ = 20461000. Its totient is φ = 20201688.

The previous prime is 20331329. The next prime is 20331373. The reversal of 20331343 is 34313302.

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 20331343 - 2¹³ = 20323151 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 20331343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331313) 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, 64593 + ... + 64906.

It is an arithmetic number, because the mean of its divisors is an integer number (5115250).

Almost surely, 2^20331343 is an apocalyptic number.

20331343 is a deficient number, since it is larger than the sum of its proper divisors (129657).

20331343 is a wasteful number, since it uses less digits than its factorization.

20331343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129656.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 20331343 is about 4509.0290529115. The cubic root of 20331343 is about 272.9325643971.

Adding to 20331343 its reverse (34313302), we get a palindrome (54644645).

The spelling of 20331343 in words is "twenty million, three hundred thirty-one thousand, three hundred forty-three".