21456733112742 has 16 divisors (see below), whose sum is σ = 42913867530240. Its totient is φ = 7152177486792.

The previous prime is 21456733112719. The next prime is 21456733112753. The reversal of 21456733112742 is 24721133765412.

It is a junction number, because it is equal to n+sod(n) for n = 21456733112691 and 21456733112700.

It is a congruent number.

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, 16023718 + ... + 17311065.

It is an arithmetic number, because the mean of its divisors is an integer number (2682116720640).

Almost surely, 2^{21456733112742} is an apocalyptic number.

21456733112742 is an abundant number, since it is smaller than the sum of its proper divisors (21457134417498).

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

21456733112742 is a wasteful number, since it uses less digits than its factorization.

21456733112742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33442067.

The product of its digits is 1693440, while the sum is 48.

The spelling of 21456733112742 in words is "twenty-one trillion, four hundred fifty-six billion, seven hundred thirty-three million, one hundred twelve thousand, seven hundred forty-two".