21347488 has 24 divisors (see below), whose sum is σ = 44241120. Its totient is φ = 10111680.

The previous prime is 21347467. The next prime is 21347533. The reversal of 21347488 is 88474312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16948 + ... + 18163.

It is an arithmetic number, because the mean of its divisors is an integer number (1843380).

Almost surely, 2^21347488 is an apocalyptic number.

It is an amenable number.

21347488 is an abundant number, since it is smaller than the sum of its proper divisors (22893632).

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

21347488 is a wasteful number, since it uses less digits than its factorization.

21347488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35140 (or 35132 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 21347488 is about 4620.3341870475. The cubic root of 21347488 is about 277.4058355398.

The spelling of 21347488 in words is "twenty-one million, three hundred forty-seven thousand, four hundred eighty-eight".