20090045 has 16 divisors (see below), whose sum is σ = 24700800. Its totient is φ = 15681600.

The previous prime is 20090027. The next prime is 20090053. The reversal of 20090045 is 54009002.

It is not a de Polignac number, because 20090045 - 2⁶ = 20089981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20089999 and 20090026.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60530 + ... + 60860.

It is an arithmetic number, because the mean of its divisors is an integer number (1543800).

Almost surely, 2^20090045 is an apocalyptic number.

It is an amenable number.

20090045 is a deficient number, since it is larger than the sum of its proper divisors (4610755).

20090045 is a wasteful number, since it uses less digits than its factorization.

20090045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20090045 is about 4482.1919860711. The cubic root of 20090045 is about 271.8485180530.

Adding to 20090045 its reverse (54009002), we get a palindrome (74099047).

The spelling of 20090045 in words is "twenty million, ninety thousand, forty-five".