20255504 has 10 divisors (see below), whose sum is σ = 39245070. Its totient is φ = 10127744.

The previous prime is 20255447. The next prime is 20255509. The reversal of 20255504 is 40555202.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 719104 = 4420^2 + 848^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20255504.

It is not an unprimeable number, because it can be changed into a prime (20255509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632969 + ... + 633000.

It is an arithmetic number, because the mean of its divisors is an integer number (3924507).

Almost surely, 2^20255504 is an apocalyptic number.

It is an amenable number.

20255504 is a deficient number, since it is larger than the sum of its proper divisors (18989566).

20255504 is a wasteful number, since it uses less digits than its factorization.

20255504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265977 (or 1265971 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 20255504 is about 4500.6115140056. The cubic root of 20255504 is about 272.5927815810.

The spelling of 20255504 in words is "twenty million, two hundred fifty-five thousand, five hundred four".