20270245 has 16 divisors (see below), whose sum is σ = 26720640. Its totient is φ = 14693184.

The previous prime is 20270203. The next prime is 20270251. The reversal of 20270245 is 54207202.

It is a cyclic number.

It is not a de Polignac number, because 20270245 - 2¹¹ = 20268197 is a prime.

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, 2454 + ... + 6823.

It is an arithmetic number, because the mean of its divisors is an integer number (1670040).

Almost surely, 2^20270245 is an apocalyptic number.

It is an amenable number.

20270245 is a deficient number, since it is larger than the sum of its proper divisors (6450395).

20270245 is a wasteful number, since it uses less digits than its factorization.

20270245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20270245 is about 4502.2488825031. The cubic root of 20270245 is about 272.6588922673.

Adding to 20270245 its reverse (54207202), we get a palindrome (74477447).

The spelling of 20270245 in words is "twenty million, two hundred seventy thousand, two hundred forty-five".