20724343 has 8 divisors (see below), whose sum is σ = 21999168. Its totient is φ = 19455744.

The previous prime is 20724287. The next prime is 20724349. The reversal of 20724343 is 34342702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20724343 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 (20724349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6555 + ... + 9187.

It is an arithmetic number, because the mean of its divisors is an integer number (2749896).

Almost surely, 2^20724343 is an apocalyptic number.

20724343 is a deficient number, since it is larger than the sum of its proper divisors (1274825).

20724343 is a wasteful number, since it uses less digits than its factorization.

20724343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 20724343 is about 4552.3996968632. The cubic root of 20724343 is about 274.6799273363.

The spelling of 20724343 in words is "twenty million, seven hundred twenty-four thousand, three hundred forty-three".