21514525520353 has 4 divisors (see below), whose sum is σ = 22256405710740. Its totient is φ = 20772645329968.

The previous prime is 21514525520317. The next prime is 21514525520377. The reversal of 21514525520353 is 35302552541512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14703720018849 + 6810805501504 = 3834543^2 + 2609752^2 .

It is a cyclic number.

It is not a de Polignac number, because 21514525520353 - 2²⁵ = 21514491965921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21514525920353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370940095150 + ... + 370940095207.

It is an arithmetic number, because the mean of its divisors is an integer number (5564101427685).

Almost surely, 2^{21514525520353} is an apocalyptic number.

It is an amenable number.

21514525520353 is a deficient number, since it is larger than the sum of its proper divisors (741880190387).

21514525520353 is an equidigital number, since it uses as much as digits as its factorization.

21514525520353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741880190386.

The product of its (nonzero) digits is 900000, while the sum is 43.

The spelling of 21514525520353 in words is "twenty-one trillion, five hundred fourteen billion, five hundred twenty-five million, five hundred twenty thousand, three hundred fifty-three".