20443415 has 8 divisors (see below), whose sum is σ = 25323648. Its totient is φ = 15827040.

The previous prime is 20443403. The next prime is 20443417. The reversal of 20443415 is 51434402.

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

It is not a de Polignac number, because 20443415 - 2¹⁴ = 20427031 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 (20443417) 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, 65792 + ... + 66101.

It is an arithmetic number, because the mean of its divisors is an integer number (3165456).

Almost surely, 2^20443415 is an apocalyptic number.

20443415 is a deficient number, since it is larger than the sum of its proper divisors (4880233).

20443415 is a wasteful number, since it uses less digits than its factorization.

20443415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131929.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20443415 is about 4521.4394831735. The cubic root of 20443415 is about 273.4331390760.

Adding to 20443415 its reverse (51434402), we get a palindrome (71877817).

The spelling of 20443415 in words is "twenty million, four hundred forty-three thousand, four hundred fifteen".