20500242 has 32 divisors (see below), whose sum is σ = 47001600. Its totient is φ = 5839248.

The previous prime is 20500231. The next prime is 20500247. The reversal of 20500242 is 24200502.

It is not an unprimeable number, because it can be changed into a prime (20500247) 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, 19609 + ... + 20627.

It is an arithmetic number, because the mean of its divisors is an integer number (1468800).

Almost surely, 2^20500242 is an apocalyptic number.

20500242 is an abundant number, since it is smaller than the sum of its proper divisors (26501358).

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

20500242 is a wasteful number, since it uses less digits than its factorization.

20500242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20500242 is about 4527.7192934191. The cubic root of 20500242 is about 273.6862606758.

Adding to 20500242 its reverse (24200502), we get a palindrome (44700744).

The spelling of 20500242 in words is "twenty million, five hundred thousand, two hundred forty-two".