21334608 has 30 divisors (see below), whose sum is σ = 59707674. Its totient is φ = 7111488.

The previous prime is 21334561. The next prime is 21334613. The reversal of 21334608 is 80643312.

It is a happy number.

21334608 is a `hidden beast` number, since 21 + 3 + 34 + 608 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 1192464 = 4488^2 + 1092^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73935 + ... + 74222.

Almost surely, 2^21334608 is an apocalyptic number.

It is an amenable number.

21334608 is an abundant number, since it is smaller than the sum of its proper divisors (38373066).

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

21334608 is a wasteful number, since it uses less digits than its factorization.

21334608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148171 (or 148162 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 21334608 is about 4618.9401381702. The cubic root of 21334608 is about 277.3500334084.

The spelling of 21334608 in words is "twenty-one million, three hundred thirty-four thousand, six hundred eight".