20860045 has 8 divisors (see below), whose sum is σ = 25708824. Its totient is φ = 16236864.

The previous prime is 20860033. The next prime is 20860061. The reversal of 20860045 is 54006802.

It can be written as a sum of positive squares in 4 ways, for example, as 6260004 + 14600041 = 2502^2 + 3821^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20860045 - 2⁹ = 20859533 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 56194 + ... + 56563.

It is an arithmetic number, because the mean of its divisors is an integer number (3213603).

Almost surely, 2^20860045 is an apocalyptic number.

It is an amenable number.

20860045 is a deficient number, since it is larger than the sum of its proper divisors (4848779).

20860045 is a wasteful number, since it uses less digits than its factorization.

20860045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112799.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20860045 is about 4567.2798250162. The cubic root of 20860045 is about 275.2781538230.

Adding to 20860045 its reverse (54006802), we get a palindrome (74866847).

The spelling of 20860045 in words is "twenty million, eight hundred sixty thousand, forty-five".