20455504 has 20 divisors (see below), whose sum is σ = 39719680. Its totient is φ = 10205280.

The previous prime is 20455499. The next prime is 20455529. The reversal of 20455504 is 40555402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8017 + ... + 10255.

It is an arithmetic number, because the mean of its divisors is an integer number (1985984).

Almost surely, 2^20455504 is an apocalyptic number.

It is an amenable number.

20455504 is a deficient number, since it is larger than the sum of its proper divisors (19264176).

20455504 is a wasteful number, since it uses less digits than its factorization.

20455504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2812 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 20455504 is about 4522.7761386122. The cubic root of 20455504 is about 273.4870257329.

The spelling of 20455504 in words is "twenty million, four hundred fifty-five thousand, five hundred four".