21436089441 has 16 divisors (see below), whose sum is σ = 30789675840. Its totient is φ = 13187304000.

The previous prime is 21436089403. The next prime is 21436089457. The reversal of 21436089441 is 14498063412.

It is not a de Polignac number, because 21436089441 - 2¹⁹ = 21435565153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21436089393 and 21436089402.

It is not an unprimeable number, because it can be changed into a prime (21436089041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42255 + ... + 211323.

It is an arithmetic number, because the mean of its divisors is an integer number (1924354740).

Almost surely, 2^21436089441 is an apocalyptic number.

It is an amenable number.

21436089441 is a deficient number, since it is larger than the sum of its proper divisors (9353586399).

21436089441 is a wasteful number, since it uses less digits than its factorization.

21436089441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172336.

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 21436089441 in words is "twenty-one billion, four hundred thirty-six million, eighty-nine thousand, four hundred forty-one".