20245242 has 16 divisors (see below), whose sum is σ = 40592160. Its totient is φ = 6731472.

The previous prime is 20245237. The next prime is 20245259. The reversal of 20245242 is 24254202.

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, 1513 + ... + 6540.

It is an arithmetic number, because the mean of its divisors is an integer number (2537010).

Almost surely, 2^20245242 is an apocalyptic number.

20245242 is an abundant number, since it is smaller than the sum of its proper divisors (20346918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20245242 is a wasteful number, since it uses less digits than its factorization.

20245242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 20245242 is about 4499.4713022754. The cubic root of 20245242 is about 272.5467394507.

Adding to 20245242 its reverse (24254202), we get a palindrome (44499444).

The spelling of 20245242 in words is "twenty million, two hundred forty-five thousand, two hundred forty-two".