22018545 has 36 divisors (see below), whose sum is σ = 39099060. Its totient is φ = 11461824.

The previous prime is 22018543. The next prime is 22018561. The reversal of 22018545 is 54581022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11675889 + 10342656 = 3417^2 + 3216^2 .

It is not a de Polignac number, because 22018545 - 2¹ = 22018543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22018543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 201951 + ... + 202059.

It is an arithmetic number, because the mean of its divisors is an integer number (1086085).

Almost surely, 2^22018545 is an apocalyptic number.

It is an amenable number.

22018545 is a deficient number, since it is larger than the sum of its proper divisors (17080515).

22018545 is a wasteful number, since it uses less digits than its factorization.

22018545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 22018545 is about 4692.3922470314. The cubic root of 22018545 is about 280.2826440128.

Adding to 22018545 its reverse (54581022), we get a palindrome (76599567).

The spelling of 22018545 in words is "twenty-two million, eighteen thousand, five hundred forty-five".