21242422193 has 8 divisors (see below), whose sum is σ = 21987175080. Its totient is φ = 20498486400.

The previous prime is 21242422177. The next prime is 21242422247. The reversal of 21242422193 is 39122424212.

It can be written as a sum of positive squares in 4 ways, for example, as 4543838464 + 16698583729 = 67408^2 + 129223^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21242422193 - 2⁴ = 21242422177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21242422093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151130 + ... + 255587.

It is an arithmetic number, because the mean of its divisors is an integer number (2748396885).

Almost surely, 2^21242422193 is an apocalyptic number.

It is an amenable number.

21242422193 is a deficient number, since it is larger than the sum of its proper divisors (744752887).

21242422193 is a wasteful number, since it uses less digits than its factorization.

21242422193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408547.

The product of its digits is 13824, while the sum is 32.

The spelling of 21242422193 in words is "twenty-one billion, two hundred forty-two million, four hundred twenty-two thousand, one hundred ninety-three".