20674856 has 32 divisors (see below), whose sum is σ = 41267880. Its totient is φ = 9676800.

The previous prime is 20674847. The next prime is 20674867. The reversal of 20674856 is 65847602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19802500 + 872356 = 4450^2 + 934^2 .

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 7 ways as a sum of consecutive naturals, for example, 37946 + ... + 38486.

Almost surely, 2^20674856 is an apocalyptic number.

It is an amenable number.

20674856 is a deficient number, since it is larger than the sum of its proper divisors (20593024).

20674856 is a wasteful number, since it uses less digits than its factorization.

20674856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 20674856 is about 4546.9611830320. The cubic root of 20674856 is about 274.4611199264.

The spelling of 20674856 in words is "twenty million, six hundred seventy-four thousand, eight hundred fifty-six".