20255146 has 16 divisors (see below), whose sum is σ = 30899880. Its totient is φ = 9956800.

The previous prime is 20255117. The next prime is 20255153. The reversal of 20255146 is 64155202.

It can be written as a sum of positive squares in 4 ways, for example, as 17313921 + 2941225 = 4161^2 + 1715^2 .

It is a super-3 number, since 3×20255146³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20255146.

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 in 7 ways as a sum of consecutive naturals, for example, 39540 + ... + 40048.

Almost surely, 2^20255146 is an apocalyptic number.

20255146 is a deficient number, since it is larger than the sum of its proper divisors (10644734).

20255146 is a wasteful number, since it uses less digits than its factorization.

20255146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20255146 is about 4500.5717414569. The cubic root of 20255146 is about 272.5911756176.

The spelling of 20255146 in words is "twenty million, two hundred fifty-five thousand, one hundred forty-six".