20428882 has 8 divisors (see below), whose sum is σ = 30987900. Its totient is φ = 10099584.

The previous prime is 20428843. The next prime is 20428909. The reversal of 20428882 is 28882402.

It can be written as a sum of positive squares in 2 ways, for example, as 18241441 + 2187441 = 4271^2 + 1479^2 .

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

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, 57207 + ... + 57562.

Almost surely, 2^20428882 is an apocalyptic number.

20428882 is a deficient number, since it is larger than the sum of its proper divisors (10559018).

20428882 is a wasteful number, since it uses less digits than its factorization.

20428882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114860.

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 20428882 is about 4519.8320765267. The cubic root of 20428882 is about 273.3683301742.

The spelling of 20428882 in words is "twenty million, four hundred twenty-eight thousand, eight hundred eighty-two".