20127445 has 16 divisors (see below), whose sum is σ = 26717040. Its totient is φ = 14459904.

The previous prime is 20127431. The next prime is 20127451. The reversal of 20127445 is 54472102.

It can be written as a sum of positive squares in 8 ways, for example, as 119716 + 20007729 = 346^2 + 4473^2 .

It is a cyclic number.

It is not a de Polignac number, because 20127445 - 2⁹ = 20126933 is a prime.

It is a super-2 number, since 2×20127445² = 810228084456050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1780 + ... + 6589.

It is an arithmetic number, because the mean of its divisors is an integer number (1669815).

Almost surely, 2^20127445 is an apocalyptic number.

It is an amenable number.

20127445 is a deficient number, since it is larger than the sum of its proper divisors (6589595).

20127445 is a wasteful number, since it uses less digits than its factorization.

20127445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8424.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20127445 is about 4486.3621120012. The cubic root of 20127445 is about 272.0171062266.

Adding to 20127445 its reverse (54472102), we get a palindrome (74599547).

The spelling of 20127445 in words is "twenty million, one hundred twenty-seven thousand, four hundred forty-five".