21104002 has 8 divisors (see below), whose sum is σ = 31682700. Its totient is φ = 10543104.

The previous prime is 21103961. The next prime is 21104011. The reversal of 21104002 is 20040112.

It can be written as a sum of positive squares in 2 ways, for example, as 18826921 + 2277081 = 4339^2 + 1509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21104002.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 927 + ... + 6562.

Almost surely, 2^21104002 is an apocalyptic number.

21104002 is a deficient number, since it is larger than the sum of its proper divisors (10578698).

21104002 is a wasteful number, since it uses less digits than its factorization.

21104002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 21104002 is about 4593.9092285329. The cubic root of 21104002 is about 276.3471180410.

Adding to 21104002 its reverse (20040112), we get a palindrome (41144114).

The spelling of 21104002 in words is "twenty-one million, one hundred four thousand, two".