20445682 has 8 divisors (see below), whose sum is σ = 31497516. Its totient is φ = 9946512.

The previous prime is 20445637. The next prime is 20445697. The reversal of 20445682 is 28654402.

It can be written as a sum of positive squares in 2 ways, for example, as 20439441 + 6241 = 4521^2 + 79^2 .

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138073 + ... + 138220.

Almost surely, 2^20445682 is an apocalyptic number.

20445682 is a deficient number, since it is larger than the sum of its proper divisors (11051834).

20445682 is a wasteful number, since it uses less digits than its factorization.

20445682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276332.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 20445682 is about 4521.6901707216. The cubic root of 20445682 is about 273.4432458352.

The spelling of 20445682 in words is "twenty million, four hundred forty-five thousand, six hundred eighty-two".