20446456 has 16 divisors (see below), whose sum is σ = 38395800. Its totient is φ = 10207584.

The previous prime is 20446441. The next prime is 20446463. The reversal of 20446456 is 65464402.

It is a congruent number.

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, 5091 + ... + 8173.

Almost surely, 2^20446456 is an apocalyptic number.

It is an amenable number.

20446456 is a deficient number, since it is larger than the sum of its proper divisors (17949344).

20446456 is a wasteful number, since it uses less digits than its factorization.

20446456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918 (or 3914 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 20446456 is about 4521.7757573767. The cubic root of 20446456 is about 273.4466963176.

It can be divided in two parts, 20446 and 456, that added together give a palindrome (20902).

The spelling of 20446456 in words is "twenty million, four hundred forty-six thousand, four hundred fifty-six".