20163943 has 8 divisors (see below), whose sum is σ = 20494656. Its totient is φ = 19836000.

The previous prime is 20163931. The next prime is 20163991. The reversal of 20163943 is 34936102.

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 20163943 - 2⁵ = 20163911 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 (20163043) 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, 17730 + ... + 18832.

It is an arithmetic number, because the mean of its divisors is an integer number (2561832).

Almost surely, 2^20163943 is an apocalyptic number.

20163943 is a deficient number, since it is larger than the sum of its proper divisors (330713).

20163943 is a wasteful number, since it uses less digits than its factorization.

20163943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20163943 is about 4490.4279306097. The cubic root of 20163943 is about 272.1814272217.

The spelling of 20163943 in words is "twenty million, one hundred sixty-three thousand, nine hundred forty-three".