20354403 has 8 divisors (see below), whose sum is σ = 27872848. Its totient is φ = 13202784.

The previous prime is 20354393. The next prime is 20354413. The reversal of 20354403 is 30445302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20354393) and next prime (20354413).

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

It is not a de Polignac number, because 20354403 - 2¹⁰ = 20353379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20354403.

It is not an unprimeable number, because it can be changed into a prime (20354413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91576 + ... + 91797.

It is an arithmetic number, because the mean of its divisors is an integer number (3484106).

Almost surely, 2^20354403 is an apocalyptic number.

20354403 is a deficient number, since it is larger than the sum of its proper divisors (7518445).

20354403 is a wasteful number, since it uses less digits than its factorization.

20354403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183413.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20354403 is about 4511.5854197832. The cubic root of 20354403 is about 273.0357129681.

Adding to 20354403 its reverse (30445302), we get a palindrome (50799705).

The spelling of 20354403 in words is "twenty million, three hundred fifty-four thousand, four hundred three".