21095049 has 8 divisors (see below), whose sum is σ = 28153312. Its totient is φ = 14050080.

The previous prime is 21095027. The next prime is 21095051. The reversal of 21095049 is 94059012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21095049 - 2¹⁹ = 20570761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21095059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302 + ... + 6624.

It is an arithmetic number, because the mean of its divisors is an integer number (3519164).

Almost surely, 2^21095049 is an apocalyptic number.

It is an amenable number.

21095049 is a deficient number, since it is larger than the sum of its proper divisors (7058263).

21095049 is a wasteful number, since it uses less digits than its factorization.

21095049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6647.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 21095049 is about 4592.9346827491. The cubic root of 21095049 is about 276.3080340528.

It can be divided in two parts, 210 and 95049, that added together give a palindrome (95259).

The spelling of 21095049 in words is "twenty-one million, ninety-five thousand, forty-nine".