21442543411 has 8 divisors (see below), whose sum is σ = 22706356320. Its totient is φ = 20179006848.

The previous prime is 21442543403. The next prime is 21442543429. The reversal of 21442543411 is 11434524412.

It is a happy number.

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 21442543411 - 2³ = 21442543403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442540411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102930 + ... + 231256.

It is an arithmetic number, because the mean of its divisors is an integer number (2838294540).

Almost surely, 2^21442543411 is an apocalyptic number.

21442543411 is a deficient number, since it is larger than the sum of its proper divisors (1263812909).

21442543411 is a wasteful number, since it uses less digits than its factorization.

21442543411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138173.

The product of its digits is 15360, while the sum is 31.

The spelling of 21442543411 in words is "twenty-one billion, four hundred forty-two million, five hundred forty-three thousand, four hundred eleven".