20559146 has 8 divisors (see below), whose sum is σ = 30858084. Its totient is φ = 10273120.

The previous prime is 20559127. The next prime is 20559157. The reversal of 20559146 is 64195502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20475625 + 83521 = 4525^2 + 289^2 .

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

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3926 + ... + 7518.

Almost surely, 2^20559146 is an apocalyptic number.

20559146 is a deficient number, since it is larger than the sum of its proper divisors (10298938).

20559146 is a wasteful number, since it uses less digits than its factorization.

20559146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 20559146 is about 4534.2194477109. The cubic root of 20559146 is about 273.9481405041.

The spelling of 20559146 in words is "twenty million, five hundred fifty-nine thousand, one hundred forty-six".