21942281573 has 8 divisors (see below), whose sum is σ = 22098369216. Its totient is φ = 21786336000.

The previous prime is 21942281567. The next prime is 21942281587. The reversal of 21942281573 is 37518224912.

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 21942281573 - 2¹² = 21942277477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21942281563) 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, 284678 + ... + 353448.

It is an arithmetic number, because the mean of its divisors is an integer number (2762296152).

Almost surely, 2^21942281573 is an apocalyptic number.

It is an amenable number.

21942281573 is a deficient number, since it is larger than the sum of its proper divisors (156087643).

21942281573 is a wasteful number, since it uses less digits than its factorization.

21942281573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71035.

The product of its digits is 241920, while the sum is 44.

The spelling of 21942281573 in words is "twenty-one billion, nine hundred forty-two million, two hundred eighty-one thousand, five hundred seventy-three".