21464046413 has 8 divisors (see below), whose sum is σ = 21884283960. Its totient is φ = 21047869440.

The previous prime is 21464046391. The next prime is 21464046469. The reversal of 21464046413 is 31464046412.

It can be written as a sum of positive squares in 4 ways, for example, as 2489810404 + 18974236009 = 49898^2 + 137747^2 .

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 21464046413 - 2¹² = 21464042317 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 (21464046493) 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, 1004468 + ... + 1025613.

It is an arithmetic number, because the mean of its divisors is an integer number (2735535495).

Almost surely, 2^21464046413 is an apocalyptic number.

It is an amenable number.

21464046413 is a deficient number, since it is larger than the sum of its proper divisors (420237547).

21464046413 is a wasteful number, since it uses less digits than its factorization.

21464046413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030287.

The product of its (nonzero) digits is 55296, while the sum is 35.

Subtracting 21464046413 from its reverse (31464046412), we obtain a palindrome (9999999999).

The spelling of 21464046413 in words is "twenty-one billion, four hundred sixty-four million, forty-six thousand, four hundred thirteen".