20379943 has 4 divisors (see below), whose sum is σ = 20395120. Its totient is φ = 20364768.

The previous prime is 20379929. The next prime is 20379971. The reversal of 20379943 is 34997302.

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 20379943 - 2¹³ = 20371751 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 (20379973) 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, 5355 + ... + 8332.

It is an arithmetic number, because the mean of its divisors is an integer number (5098780).

Almost surely, 2^20379943 is an apocalyptic number.

20379943 is a deficient number, since it is larger than the sum of its proper divisors (15177).

20379943 is a wasteful number, since it uses less digits than its factorization.

20379943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15176.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 20379943 is about 4514.4150230124. The cubic root of 20379943 is about 273.1498638229.

The spelling of 20379943 in words is "twenty million, three hundred seventy-nine thousand, nine hundred forty-three".