21510442865093 has 32 divisors (see below), whose sum is σ = 28114398009600. Its totient is φ = 15980815420416.

The previous prime is 21510442865071. The next prime is 21510442865113. The reversal of 21510442865093 is 39056824401512.

It is not a de Polignac number, because 21510442865093 - 2¹⁴ = 21510442848709 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 (21510442865893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54853178 + ... + 55243931.

It is an arithmetic number, because the mean of its divisors is an integer number (878574937800).

Almost surely, 2^{21510442865093} is an apocalyptic number.

It is an amenable number.

21510442865093 is a deficient number, since it is larger than the sum of its proper divisors (6603955144507).

21510442865093 is a wasteful number, since it uses less digits than its factorization.

21510442865093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110097261.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 21510442865093 in words is "twenty-one trillion, five hundred ten billion, four hundred forty-two million, eight hundred sixty-five thousand, ninety-three".