21330104 has 48 divisors (see below), whose sum is σ = 43876080. Its totient is φ = 9685760.

The previous prime is 21330097. The next prime is 21330119. The reversal of 21330104 is 40103312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300389 + ... + 300459.

It is an arithmetic number, because the mean of its divisors is an integer number (914085).

Almost surely, 2^21330104 is an apocalyptic number.

It is an amenable number.

21330104 is an abundant number, since it is smaller than the sum of its proper divisors (22545976).

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

21330104 is a wasteful number, since it uses less digits than its factorization.

21330104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21330104 is about 4618.4525546984. The cubic root of 21330104 is about 277.3305146923.

Adding to 21330104 its reverse (40103312), we get a palindrome (61433416).

The spelling of 21330104 in words is "twenty-one million, three hundred thirty thousand, one hundred four".