21442555233541 has 16 divisors (see below), whose sum is σ = 24111512611200. Its totient is φ = 18932002423488.

The previous prime is 21442555233527. The next prime is 21442555233551. The reversal of 21442555233541 is 14533255524412.

It is a cyclic number.

It is not a de Polignac number, because 21442555233541 - 2⁷ = 21442555233413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21442555233491 and 21442555233500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442555233511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265739121 + ... + 265819798.

It is an arithmetic number, because the mean of its divisors is an integer number (1506969538200).

Almost surely, 2^{21442555233541} is an apocalyptic number.

It is an amenable number.

21442555233541 is a deficient number, since it is larger than the sum of its proper divisors (2668957377659).

21442555233541 is a wasteful number, since it uses less digits than its factorization.

21442555233541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531559068.

The product of its digits is 2880000, while the sum is 46.

The spelling of 21442555233541 in words is "twenty-one trillion, four hundred forty-two billion, five hundred fifty-five million, two hundred thirty-three thousand, five hundred forty-one".