20675456 has 16 divisors (see below), whose sum is σ = 41189640. Its totient is φ = 10337664.

The previous prime is 20675443. The next prime is 20675471. The reversal of 20675456 is 65457602.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent 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 as a sum of consecutive naturals, namely, 80636 + ... + 80891.

Almost surely, 2^20675456 is an apocalyptic number.

It is an amenable number.

20675456 is a deficient number, since it is larger than the sum of its proper divisors (20514184).

20675456 is an equidigital number, since it uses as much as digits as its factorization.

20675456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161541 (or 161529 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 20675456 is about 4547.0271606842. The cubic root of 20675456 is about 274.4637749240.

The spelling of 20675456 in words is "twenty million, six hundred seventy-five thousand, four hundred fifty-six".