21095408 has 10 divisors (see below), whose sum is σ = 40872384. Its totient is φ = 10547696.

The previous prime is 21095401. The next prime is 21095423. The reversal of 21095408 is 80459012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21095401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659216 + ... + 659247.

Almost surely, 2^21095408 is an apocalyptic number.

It is an amenable number.

21095408 is a deficient number, since it is larger than the sum of its proper divisors (19776976).

21095408 is a wasteful number, since it uses less digits than its factorization.

21095408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318471 (or 1318465 counting only the distinct ones).

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

The square root of 21095408 is about 4592.9737643492. The cubic root of 21095408 is about 276.3096014667.

The spelling of 21095408 in words is "twenty-one million, ninety-five thousand, four hundred eight".