21295208 has 32 divisors (see below), whose sum is σ = 44064000. Its totient is φ = 9567360.

The previous prime is 21295207. The next prime is 21295231. The reversal of 21295208 is 80259212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21295201) 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, 6473 + ... + 9191.

It is an arithmetic number, because the mean of its divisors is an integer number (1377000).

Almost surely, 2^21295208 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 21295208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22032000).

21295208 is an abundant number, since it is smaller than the sum of its proper divisors (22768792).

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

21295208 is a wasteful number, since it uses less digits than its factorization.

21295208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825 (or 2821 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 21295208 is about 4614.6731195178. The cubic root of 21295208 is about 277.1791947860.

It can be divided in two parts, 2129 and 5208, that added together give a palindrome (7337).

The spelling of 21295208 in words is "twenty-one million, two hundred ninety-five thousand, two hundred eight".