20331244242 has 16 divisors (see below), whose sum is σ = 45180542880. Its totient is φ = 6777081396.

The previous prime is 20331244217. The next prime is 20331244249. The reversal of 20331244242 is 24244213302.

20331244242 is a `hidden beast` number, since 203 + 3 + 12 + 442 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20331244249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188252208 + ... + 188252315.

It is an arithmetic number, because the mean of its divisors is an integer number (2823783930).

Almost surely, 2^20331244242 is an apocalyptic number.

20331244242 is an abundant number, since it is smaller than the sum of its proper divisors (24849298638).

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

20331244242 is a wasteful number, since it uses less digits than its factorization.

20331244242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376504534 (or 376504528 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20331244242 its reverse (24244213302), we get a palindrome (44575457544).

The spelling of 20331244242 in words is "twenty billion, three hundred thirty-one million, two hundred forty-four thousand, two hundred forty-two".