21013145095 has 16 divisors (see below), whose sum is σ = 26547978240. Its totient is φ = 15922717344.

The previous prime is 21013145081. The next prime is 21013145149. The reversal of 21013145095 is 59054131012.

It is a cyclic number.

It is not a de Polignac number, because 21013145095 - 2²⁵ = 20979590663 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565582 + ... + 601588.

It is an arithmetic number, because the mean of its divisors is an integer number (1659248640).

Almost surely, 2^21013145095 is an apocalyptic number.

21013145095 is a deficient number, since it is larger than the sum of its proper divisors (5534833145).

21013145095 is a wasteful number, since it uses less digits than its factorization.

21013145095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42174.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 21013145095 in words is "twenty-one billion, thirteen million, one hundred forty-five thousand, ninety-five".