21413444264 has 32 divisors (see below), whose sum is σ = 40297331520. Its totient is φ = 10667561856.

The previous prime is 21413444263. The next prime is 21413444267. The reversal of 21413444264 is 46244431412.

It is not an unprimeable number, because it can be changed into a prime (21413444263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712467 + ... + 2720349.

It is an arithmetic number, because the mean of its divisors is an integer number (1259291610).

Almost surely, 2^21413444264 is an apocalyptic number.

It is an amenable number.

21413444264 is a deficient number, since it is larger than the sum of its proper divisors (18883887256).

21413444264 is a wasteful number, since it uses less digits than its factorization.

21413444264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9089 (or 9085 counting only the distinct ones).

The product of its digits is 73728, while the sum is 35.

Adding to 21413444264 its reverse (46244431412), we get a palindrome (67657875676).

The spelling of 21413444264 in words is "twenty-one billion, four hundred thirteen million, four hundred forty-four thousand, two hundred sixty-four".