20633245 has 8 divisors (see below), whose sum is σ = 24857784. Its totient is φ = 16441344.

The previous prime is 20633237. The next prime is 20633279. The reversal of 20633245 is 54233602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7171684 + 13461561 = 2678^2 + 3669^2 .

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 20633245 - 2³ = 20633237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6744 + ... + 9313.

It is an arithmetic number, because the mean of its divisors is an integer number (3107223).

Almost surely, 2^20633245 is an apocalyptic number.

It is an amenable number.

20633245 is a deficient number, since it is larger than the sum of its proper divisors (4224539).

20633245 is a wasteful number, since it uses less digits than its factorization.

20633245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16319.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20633245 is about 4542.3831850693. The cubic root of 20633245 is about 274.2768659694.

Adding to 20633245 its reverse (54233602), we get a palindrome (74866847).

The spelling of 20633245 in words is "twenty million, six hundred thirty-three thousand, two hundred forty-five".