21095088529 has 4 divisors (see below), whose sum is σ = 21095573284. Its totient is φ = 21094603776.

The previous prime is 21095088517. The next prime is 21095088559. The reversal of 21095088529 is 92588059012.

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 14652618304 + 6442470225 = 121048^2 + 80265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21095088529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21095088559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169872 + ... + 266545.

It is an arithmetic number, because the mean of its divisors is an integer number (5273893321).

Almost surely, 2^21095088529 is an apocalyptic number.

It is an amenable number.

21095088529 is a deficient number, since it is larger than the sum of its proper divisors (484755).

21095088529 is an equidigital number, since it uses as much as digits as its factorization.

21095088529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484754.

The product of its (nonzero) digits is 518400, while the sum is 49.

The spelling of 21095088529 in words is "twenty-one billion, ninety-five million, eighty-eight thousand, five hundred twenty-nine".