21403494613 has 8 divisors (see below), whose sum is σ = 21822566400. Its totient is φ = 20984987088.

The previous prime is 21403494611. The next prime is 21403494643. The reversal of 21403494613 is 31649430412.

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 21403494613 - 2¹ = 21403494611 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 (21403494611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64053 + ... + 216586.

It is an arithmetic number, because the mean of its divisors is an integer number (2727820800).

Almost surely, 2^21403494613 is an apocalyptic number.

It is an amenable number.

21403494613 is a deficient number, since it is larger than the sum of its proper divisors (419071787).

21403494613 is a wasteful number, since it uses less digits than its factorization.

21403494613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282131.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 21403494613 in words is "twenty-one billion, four hundred three million, four hundred ninety-four thousand, six hundred thirteen".