20531242222 has 8 divisors (see below), whose sum is σ = 30798467856. Its totient is φ = 10265086272.

The previous prime is 20531242219. The next prime is 20531242253. The reversal of 20531242222 is 22224213502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 217578 + ... + 297325.

It is an arithmetic number, because the mean of its divisors is an integer number (3849808482).

Almost surely, 2^20531242222 is an apocalyptic number.

20531242222 is a deficient number, since it is larger than the sum of its proper divisors (10267225634).

20531242222 is a wasteful number, since it uses less digits than its factorization.

20531242222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534842.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20531242222 its reverse (22224213502), we get a palindrome (42755455724).

The spelling of 20531242222 in words is "twenty billion, five hundred thirty-one million, two hundred forty-two thousand, two hundred twenty-two".