21411608 has 8 divisors (see below), whose sum is σ = 40146780. Its totient is φ = 10705800.

The previous prime is 21411589. The next prime is 21411617. The reversal of 21411608 is 80611412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1338218 + ... + 1338233.

Almost surely, 2^21411608 is an apocalyptic number.

It is an amenable number.

21411608 is a deficient number, since it is larger than the sum of its proper divisors (18735172).

21411608 is a wasteful number, since it uses less digits than its factorization.

21411608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676457 (or 2676453 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 21411608 is about 4627.2678764040. The cubic root of 21411608 is about 277.6832996148.

The spelling of 21411608 in words is "twenty-one million, four hundred eleven thousand, six hundred eight".