21347104 has 24 divisors (see below), whose sum is σ = 44500428. Its totient is φ = 10045440.

The previous prime is 21347077. The next prime is 21347111. The reversal of 21347104 is 40174312.

It can be written as a sum of positive squares in 2 ways, for example, as 21344400 + 2704 = 4620^2 + 52^2 .

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, 19077 + ... + 20164.

Almost surely, 2^21347104 is an apocalyptic number.

It is an amenable number.

21347104 is an abundant number, since it is smaller than the sum of its proper divisors (23153324).

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

21347104 is a wasteful number, since it uses less digits than its factorization.

21347104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39268 (or 39260 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 21347104 is about 4620.2926314250. The cubic root of 21347104 is about 277.4041721984.

The spelling of 21347104 in words is "twenty-one million, three hundred forty-seven thousand, one hundred four".