21942045254026 has 16 divisors (see below), whose sum is σ = 34654721268960. Its totient is φ = 10390784386320.

The previous prime is 21942045254009. The next prime is 21942045254053. The reversal of 21942045254026 is 62045254024912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78080041 + ... + 78360556.

It is an arithmetic number, because the mean of its divisors is an integer number (2165920079310).

Almost surely, 2^{21942045254026} is an apocalyptic number.

21942045254026 is a deficient number, since it is larger than the sum of its proper divisors (12712676014934).

21942045254026 is a wasteful number, since it uses less digits than its factorization.

21942045254026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156444309.

The product of its (nonzero) digits is 1382400, while the sum is 46.

Adding to 21942045254026 its reverse (62045254024912), we get a palindrome (83987299278938).

The spelling of 21942045254026 in words is "twenty-one trillion, nine hundred forty-two billion, forty-five million, two hundred fifty-four thousand, twenty-six".