21304022013 has 48 divisors (see below), whose sum is σ = 31847961600. Its totient is φ = 13714272000.

The previous prime is 21304021993. The next prime is 21304022017. The reversal of 21304022013 is 31022040312.

It is not a de Polignac number, because 21304022013 - 2¹³ = 21304013821 is a prime.

It is a super-3 number, since 3×21304022013³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304022017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16374463 + ... + 16375763.

It is an arithmetic number, because the mean of its divisors is an integer number (663499200).

Almost surely, 2^21304022013 is an apocalyptic number.

It is an amenable number.

21304022013 is a deficient number, since it is larger than the sum of its proper divisors (10543939587).

21304022013 is a wasteful number, since it uses less digits than its factorization.

21304022013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1767 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21304022013 its reverse (31022040312), we get a palindrome (52326062325).

The spelling of 21304022013 in words is "twenty-one billion, three hundred four million, twenty-two thousand, thirteen".