20731343 has 8 divisors (see below), whose sum is σ = 21695616. Its totient is φ = 19785600.

The previous prime is 20731339. The next prime is 20731351. The reversal of 20731343 is 34313702.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20731343 - 2² = 20731339 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 (20731043) 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, 2318 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (2711952).

Almost surely, 2^20731343 is an apocalyptic number.

20731343 is a deficient number, since it is larger than the sum of its proper divisors (964273).

20731343 is an equidigital number, since it uses as much as digits as its factorization.

20731343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9265.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 20731343 is about 4553.1684572394. The cubic root of 20731343 is about 274.7108497971.

The spelling of 20731343 in words is "twenty million, seven hundred thirty-one thousand, three hundred forty-three".