20056553 has 8 divisors (see below), whose sum is σ = 22471680. Its totient is φ = 17740080.

The previous prime is 20056523. The next prime is 20056559. The reversal of 20056553 is 35565002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20056553 - 2⁸ = 20056297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20056559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24233 + ... + 25046.

It is an arithmetic number, because the mean of its divisors is an integer number (2808960).

Almost surely, 2^20056553 is an apocalyptic number.

It is an amenable number.

20056553 is a deficient number, since it is larger than the sum of its proper divisors (2415127).

20056553 is a wasteful number, since it uses less digits than its factorization.

20056553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49327.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 20056553 is about 4478.4543092455. The cubic root of 20056553 is about 271.6973683211.

It can be divided in two parts, 2005 and 6553, that added together give a palindrome (8558).

The spelling of 20056553 in words is "twenty million, fifty-six thousand, five hundred fifty-three".