21439489535 has 8 divisors (see below), whose sum is σ = 25728796800. Its totient is φ = 17150652064.

The previous prime is 21439489529. The next prime is 21439489579. The reversal of 21439489535 is 53598493412.

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 21439489535 - 2³⁰ = 20365747711 is a prime.

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, 7727 + ... + 207216.

It is an arithmetic number, because the mean of its divisors is an integer number (3216099600).

Almost surely, 2^21439489535 is an apocalyptic number.

21439489535 is a deficient number, since it is larger than the sum of its proper divisors (4289307265).

21439489535 is a wasteful number, since it uses less digits than its factorization.

21439489535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234897.

The product of its digits is 4665600, while the sum is 53.

The spelling of 21439489535 in words is "twenty-one billion, four hundred thirty-nine million, four hundred eighty-nine thousand, five hundred thirty-five".