20475844 has 12 divisors (see below), whose sum is σ = 37718800. Its totient is φ = 9699048.

The previous prime is 20475839. The next prime is 20475853. The reversal of 20475844 is 44857402.

It is a happy 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, 134634 + ... + 134785.

Almost surely, 2^20475844 is an apocalyptic number.

It is an amenable number.

20475844 is a deficient number, since it is larger than the sum of its proper divisors (17242956).

20475844 is a wasteful number, since it uses less digits than its factorization.

20475844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269442 (or 269440 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 20475844 is about 4525.0241988303. The cubic root of 20475844 is about 273.5776432891.

The spelling of 20475844 in words is "twenty million, four hundred seventy-five thousand, eight hundred forty-four".