21104050 has 24 divisors (see below), whose sum is σ = 42823152. Its totient is φ = 7674000.

The previous prime is 21104033. The next prime is 21104059. The reversal of 21104050 is 5040112.

It is a self number, because there is not a number n which added to its sum of digits gives 21104050.

It is not an unprimeable number, because it can be changed into a prime (21104059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18636 + ... + 19735.

It is an arithmetic number, because the mean of its divisors is an integer number (1784298).

Almost surely, 2^21104050 is an apocalyptic number.

21104050 is an abundant number, since it is smaller than the sum of its proper divisors (21719102).

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

21104050 is a wasteful number, since it uses less digits than its factorization.

21104050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38394 (or 38389 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 21104050 is about 4593.9144528387. The cubic root of 21104050 is about 276.3473275535.

Adding to 21104050 its reverse (5040112), we get a palindrome (26144162).

The spelling of 21104050 in words is "twenty-one million, one hundred four thousand, fifty".