21513000213 has 12 divisors (see below), whose sum is σ = 31512001248. Its totient is φ = 14139999720.

The previous prime is 21513000199. The next prime is 21513000227. The reversal of 21513000213 is 31200031512.

21513000213 is a `hidden beast` number, since 2 + 151 + 300 + 0 + 213 = 666.

It is an interprime number because it is at equal distance from previous prime (21513000199) and next prime (21513000227).

It is not a de Polignac number, because 21513000213 - 2⁵ = 21513000181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513000253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16832695 + ... + 16833972.

It is an arithmetic number, because the mean of its divisors is an integer number (2626000104).

Almost surely, 2^21513000213 is an apocalyptic number.

It is an amenable number.

21513000213 is a deficient number, since it is larger than the sum of its proper divisors (9999001035).

21513000213 is a wasteful number, since it uses less digits than its factorization.

21513000213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33666744 (or 33666741 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 21513000213 its reverse (31200031512), we get a palindrome (52713031725).

The spelling of 21513000213 in words is "twenty-one billion, five hundred thirteen million, two hundred thirteen", and thus it is an aban number.