21607148 has 6 divisors (see below), whose sum is σ = 37812516. Its totient is φ = 10803572.

The previous prime is 21607129. The next prime is 21607151. The reversal of 21607148 is 84170612.

It is a self number, because there is not a number n which added to its sum of digits gives 21607148.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2700890 + ... + 2700897.

It is an arithmetic number, because the mean of its divisors is an integer number (6302086).

Almost surely, 2^21607148 is an apocalyptic number.

It is an amenable number.

21607148 is a deficient number, since it is larger than the sum of its proper divisors (16205368).

21607148 is a wasteful number, since it uses less digits than its factorization.

21607148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5401791 (or 5401789 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 21607148 is about 4648.3489541987. The cubic root of 21607148 is about 278.5260470703.

The spelling of 21607148 in words is "twenty-one million, six hundred seven thousand, one hundred forty-eight".