20179943 has 8 divisors (see below), whose sum is σ = 23599488. Its totient is φ = 16894584.

The previous prime is 20179937. The next prime is 20179961. The reversal of 20179943 is 34997102.

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

It is not a de Polignac number, because 20179943 - 2⁴ = 20179927 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 (20179343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33221 + ... + 33822.

It is an arithmetic number, because the mean of its divisors is an integer number (2949936).

Almost surely, 2^20179943 is an apocalyptic number.

20179943 is a deficient number, since it is larger than the sum of its proper divisors (3419545).

20179943 is an equidigital number, since it uses as much as digits as its factorization.

20179943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67093.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20179943 is about 4492.2091447305. The cubic root of 20179943 is about 272.2533997765.

The spelling of 20179943 in words is "twenty million, one hundred seventy-nine thousand, nine hundred forty-three".