20027545 has 16 divisors (see below), whose sum is σ = 25540560. Its totient is φ = 15047424.

The previous prime is 20027531. The next prime is 20027561. The reversal of 20027545 is 54572002.

It can be written as a sum of positive squares in 8 ways, for example, as 737881 + 19289664 = 859^2 + 4392^2 .

It is a cyclic number.

It is not a de Polignac number, because 20027545 - 2¹¹ = 20025497 is a prime.

It is a super-2 number, since 2×20027545² = 802205117454050, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 3499 + ... + 7231.

It is an arithmetic number, because the mean of its divisors is an integer number (1596285).

Almost surely, 2^20027545 is an apocalyptic number.

It is an amenable number.

20027545 is a deficient number, since it is larger than the sum of its proper divisors (5513015).

20027545 is a wasteful number, since it uses less digits than its factorization.

20027545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20027545 is about 4475.2145199979. The cubic root of 20027545 is about 271.5663188836.

Adding to 20027545 its reverse (54572002), we get a palindrome (74599547).

The spelling of 20027545 in words is "twenty million, twenty-seven thousand, five hundred forty-five".