20502245 has 16 divisors (see below), whose sum is σ = 25159680. Its totient is φ = 16035264.

The previous prime is 20502233. The next prime is 20502247. The reversal of 20502245 is 54220502.

It is a cyclic number.

It is not a de Polignac number, because 20502245 - 2⁸ = 20501989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52511 + ... + 52899.

It is an arithmetic number, because the mean of its divisors is an integer number (1572480).

Almost surely, 2^20502245 is an apocalyptic number.

It is an amenable number.

20502245 is a deficient number, since it is larger than the sum of its proper divisors (4657435).

20502245 is a wasteful number, since it uses less digits than its factorization.

20502245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20502245 is about 4527.9404810576. The cubic root of 20502245 is about 273.6951739970.

Adding to 20502245 its reverse (54220502), we get a palindrome (74722747).

The spelling of 20502245 in words is "twenty million, five hundred two thousand, two hundred forty-five".