20002256 has 10 divisors (see below), whose sum is σ = 38754402. Its totient is φ = 10001120.

The previous prime is 20002201. The next prime is 20002261. The reversal of 20002256 is 65220002.

It can be written as a sum of positive squares in only one way, i.e., 17505856 + 2496400 = 4184^2 + 1580^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 625055 + ... + 625086.

Almost surely, 2^20002256 is an apocalyptic number.

It is an amenable number.

20002256 is a deficient number, since it is larger than the sum of its proper divisors (18752146).

20002256 is a wasteful number, since it uses less digits than its factorization.

20002256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250149 (or 1250143 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20002256 is about 4472.3881763550. The cubic root of 20002256 is about 271.4519674860.

Adding to 20002256 its reverse (65220002), we get a palindrome (85222258).

The spelling of 20002256 in words is "twenty million, two thousand, two hundred fifty-six".