21414895 has 4 divisors (see below), whose sum is σ = 25697880. Its totient is φ = 17131912.

The previous prime is 21414871. The next prime is 21414923. The reversal of 21414895 is 59841412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21414895 - 2¹³ = 21406703 is a prime.

It is a super-2 number, since 2×21414895² = 917195455722050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21414895.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2141485 + ... + 2141494.

It is an arithmetic number, because the mean of its divisors is an integer number (6424470).

Almost surely, 2^21414895 is an apocalyptic number.

21414895 is a deficient number, since it is larger than the sum of its proper divisors (4282985).

21414895 is an equidigital number, since it uses as much as digits as its factorization.

21414895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282984.

The product of its digits is 11520, while the sum is 34.

The square root of 21414895 is about 4627.6230399634. The cubic root of 21414895 is about 277.6975083920.

The spelling of 21414895 in words is "twenty-one million, four hundred fourteen thousand, eight hundred ninety-five".