21344895 has 96 divisors (see below), whose sum is σ = 45287424. Its totient is φ = 9158400.

The previous prime is 21344857. The next prime is 21344903. The reversal of 21344895 is 59844312.

It is not a de Polignac number, because 21344895 - 2⁶ = 21344831 is a prime.

It is a super-2 number, since 2×21344895² = 911209085122050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 199432 + ... + 199538.

It is an arithmetic number, because the mean of its divisors is an integer number (471744).

Almost surely, 2^21344895 is an apocalyptic number.

21344895 is an abundant number, since it is smaller than the sum of its proper divisors (23942529).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21344895 is a wasteful number, since it uses less digits than its factorization.

21344895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 170 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 21344895 is about 4620.0535711180. The cubic root of 21344895 is about 277.3946032665.

The spelling of 21344895 in words is "twenty-one million, three hundred forty-four thousand, eight hundred ninety-five".