21495344 has 40 divisors (see below), whose sum is σ = 47496960. Its totient is φ = 9335808.

The previous prime is 21495329. The next prime is 21495367. The reversal of 21495344 is 44359412.

It is a self number, because there is not a number n which added to its sum of digits gives 21495344.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497 + ... + 6575.

It is an arithmetic number, because the mean of its divisors is an integer number (1187424).

Almost surely, 2^21495344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21495344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23748480).

21495344 is an abundant number, since it is smaller than the sum of its proper divisors (26001616).

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

21495344 is a wasteful number, since it uses less digits than its factorization.

21495344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117 (or 6111 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 21495344 is about 4636.3071511711. The cubic root of 21495344 is about 278.0448144720.

The spelling of 21495344 in words is "twenty-one million, four hundred ninety-five thousand, three hundred forty-four".