21409757589 has 32 divisors (see below), whose sum is σ = 32111009280. Its totient is φ = 12574440000.

The previous prime is 21409757563. The next prime is 21409757599. The reversal of 21409757589 is 98575790412.

It is not a de Polignac number, because 21409757589 - 2⁸ = 21409757333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21409757519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271542 + ... + 341400.

It is an arithmetic number, because the mean of its divisors is an integer number (1003469040).

Almost surely, 2^21409757589 is an apocalyptic number.

It is an amenable number.

21409757589 is a deficient number, since it is larger than the sum of its proper divisors (10701251691).

21409757589 is a wasteful number, since it uses less digits than its factorization.

21409757589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70161.

The product of its (nonzero) digits is 6350400, while the sum is 57.

The spelling of 21409757589 in words is "twenty-one billion, four hundred nine million, seven hundred fifty-seven thousand, five hundred eighty-nine".