21144095 has 16 divisors (see below), whose sum is σ = 29090880. Its totient is φ = 14452224.

The previous prime is 21144083. The next prime is 21144119. The reversal of 21144095 is 59044112.

It is a cyclic number.

It is not a de Polignac number, because 21144095 - 2⁸ = 21143839 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12839 + ... + 14391.

It is an arithmetic number, because the mean of its divisors is an integer number (1818180).

Almost surely, 2^21144095 is an apocalyptic number.

21144095 is a deficient number, since it is larger than the sum of its proper divisors (7946785).

21144095 is a wasteful number, since it uses less digits than its factorization.

21144095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 21144095 is about 4598.2708706643. The cubic root of 21144095 is about 276.5220070840.

The spelling of 21144095 in words is "twenty-one million, one hundred forty-four thousand, ninety-five".