21267104 has 12 divisors (see below), whose sum is σ = 41869674. Its totient is φ = 10633536.

The previous prime is 21267091. The next prime is 21267107. The reversal of 21267104 is 40176212.

It can be written as a sum of positive squares in only one way, i.e., 17472400 + 3794704 = 4180^2 + 1948^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21267104.

It is not an unprimeable number, because it can be changed into a prime (21267107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332267 + ... + 332330.

Almost surely, 2^21267104 is an apocalyptic number.

It is an amenable number.

21267104 is a deficient number, since it is larger than the sum of its proper divisors (20602570).

21267104 is an equidigital number, since it uses as much as digits as its factorization.

21267104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664607 (or 664599 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 21267104 is about 4611.6270447641. The cubic root of 21267104 is about 277.0572068808.

The spelling of 21267104 in words is "twenty-one million, two hundred sixty-seven thousand, one hundred four".