21432457355 has 8 divisors (see below), whose sum is σ = 25728637200. Its totient is φ = 17139506976.

The previous prime is 21432457339. The next prime is 21432457439. The reversal of 21432457355 is 55375423412.

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 21432457355 - 2⁴ = 21432457339 is a prime.

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, 792740 + ... + 819329.

It is an arithmetic number, because the mean of its divisors is an integer number (3216079650).

Almost surely, 2^21432457355 is an apocalyptic number.

21432457355 is a deficient number, since it is larger than the sum of its proper divisors (4296179845).

21432457355 is a wasteful number, since it uses less digits than its factorization.

21432457355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614733.

The product of its digits is 504000, while the sum is 41.

The spelling of 21432457355 in words is "twenty-one billion, four hundred thirty-two million, four hundred fifty-seven thousand, three hundred fifty-five".