21513455324213 has 16 divisors (see below), whose sum is σ = 22655883237120. Its totient is φ = 20372043073536.

The previous prime is 21513455324201. The next prime is 21513455324297. The reversal of 21513455324213 is 31242355431512.

It is not a de Polignac number, because 21513455324213 - 2¹² = 21513455320117 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 (21513455354213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815106545 + ... + 815132937.

It is an arithmetic number, because the mean of its divisors is an integer number (1415992702320).

Almost surely, 2^{21513455324213} is an apocalyptic number.

It is an amenable number.

21513455324213 is a deficient number, since it is larger than the sum of its proper divisors (1142427912907).

21513455324213 is a wasteful number, since it uses less digits than its factorization.

21513455324213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43996.

The product of its digits is 432000, while the sum is 41.

The spelling of 21513455324213 in words is "twenty-one trillion, five hundred thirteen billion, four hundred fifty-five million, three hundred twenty-four thousand, two hundred thirteen".