20613045 has 16 divisors (see below), whose sum is σ = 33042240. Its totient is φ = 10973184.

The previous prime is 20613031. The next prime is 20613053. The reversal of 20613045 is 54031602.

It is a happy number.

It is not a de Polignac number, because 20613045 - 2⁴ = 20613029 is a prime.

It is a Curzon number.

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, 10642 + ... + 12428.

It is an arithmetic number, because the mean of its divisors is an integer number (2065140).

Almost surely, 2^20613045 is an apocalyptic number.

It is an amenable number.

20613045 is a deficient number, since it is larger than the sum of its proper divisors (12429195).

20613045 is a wasteful number, since it uses less digits than its factorization.

20613045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20613045 is about 4540.1591381801. The cubic root of 20613045 is about 274.1873308253.

Adding to 20613045 its reverse (54031602), we get a palindrome (74644647).

The spelling of 20613045 in words is "twenty million, six hundred thirteen thousand, forty-five".