21415355102513 has 8 divisors (see below), whose sum is σ = 22409132419368. Its totient is φ = 20443419045504.

The previous prime is 21415355102507. The next prime is 21415355102527. The reversal of 21415355102513 is 31520155351412.

It can be written as a sum of positive squares in 4 ways, for example, as 11785331082529 + 9630024019984 = 3432977^2 + 3103228^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21415355102513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21415355902513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5460312956 + ... + 5460316877.

It is an arithmetic number, because the mean of its divisors is an integer number (2801141552421).

Almost surely, 2^{21415355102513} is an apocalyptic number.

It is an amenable number.

21415355102513 is a deficient number, since it is larger than the sum of its proper divisors (993777316855).

21415355102513 is a wasteful number, since it uses less digits than its factorization.

21415355102513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10920629923.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 21415355102513 in words is "twenty-one trillion, four hundred fifteen billion, three hundred fifty-five million, one hundred two thousand, five hundred thirteen".