20447193 has 8 divisors (see below), whose sum is σ = 29360128. Its totient is φ = 12582864.

The previous prime is 20447191. The next prime is 20447239. The reversal of 20447193 is 39174402.

It is a happy number.

20447193 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 20447193 - 2¹ = 20447191 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20447193.

It is not an unprimeable number, because it can be changed into a prime (20447191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262105 + ... + 262182.

It is an arithmetic number, because the mean of its divisors is an integer number (3670016).

Almost surely, 2^20447193 is an apocalyptic number.

It is an amenable number.

20447193 is a deficient number, since it is larger than the sum of its proper divisors (8912935).

20447193 is a wasteful number, since it uses less digits than its factorization.

20447193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524303.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20447193 is about 4521.8572511746. The cubic root of 20447193 is about 273.4499817736.

The spelling of 20447193 in words is "twenty million, four hundred forty-seven thousand, one hundred ninety-three".