21436307485 has 8 divisors (see below), whose sum is σ = 25919932896. Its totient is φ = 17018136720.

The previous prime is 21436307483. The next prime is 21436307513. The reversal of 21436307485 is 58470363412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21436307485 - 2¹ = 21436307483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21436307483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16362939 + ... + 16364248.

It is an arithmetic number, because the mean of its divisors is an integer number (3239991612).

Almost surely, 2^21436307485 is an apocalyptic number.

It is an amenable number.

21436307485 is a deficient number, since it is larger than the sum of its proper divisors (4483625411).

21436307485 is a wasteful number, since it uses less digits than its factorization.

21436307485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32727323.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 21436307485 in words is "twenty-one billion, four hundred thirty-six million, three hundred seven thousand, four hundred eighty-five".