21313426384 has 40 divisors (see below), whose sum is σ = 41895854208. Its totient is φ = 10501733760.

The previous prime is 21313426367. The next prime is 21313426423. The reversal of 21313426384 is 48362431312.

It is a congruent number.

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, 4367754 + ... + 4372630.

Almost surely, 2^21313426384 is an apocalyptic number.

It is an amenable number.

21313426384 is a deficient number, since it is larger than the sum of its proper divisors (20582427824).

21313426384 is a wasteful number, since it uses less digits than its factorization.

21313426384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8803 (or 8797 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

Adding to 21313426384 its reverse (48362431312), we get a palindrome (69675857696).

The spelling of 21313426384 in words is "twenty-one billion, three hundred thirteen million, four hundred twenty-six thousand, three hundred eighty-four".