20406273 has 8 divisors (see below), whose sum is σ = 28808928. Its totient is φ = 12803904.

The previous prime is 20406259. The next prime is 20406289. The reversal of 20406273 is 37260402.

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

It is not a de Polignac number, because 20406273 - 2⁸ = 20406017 is a prime.

20406273 is a modest number, since divided by 6273 gives 204 as remainder.

It is not an unprimeable number, because it can be changed into a prime (20406223) 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, 200011 + ... + 200112.

It is an arithmetic number, because the mean of its divisors is an integer number (3601116).

It is a Proth number, since it is equal to 2491 ⋅ 2¹³ + 1 and 2491 < 2¹³.

Almost surely, 2^20406273 is an apocalyptic number.

It is an amenable number.

20406273 is a deficient number, since it is larger than the sum of its proper divisors (8402655).

20406273 is a wasteful number, since it uses less digits than its factorization.

20406273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400143.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20406273 is about 4517.3302956503. The cubic root of 20406273 is about 273.2674457820.

Adding to 20406273 its reverse (37260402), we get a palindrome (57666675).

The spelling of 20406273 in words is "twenty million, four hundred six thousand, two hundred seventy-three".