21104552 has 32 divisors (see below), whose sum is σ = 46686720. Its totient is φ = 8752320.

The previous prime is 21104549. The next prime is 21104561. The reversal of 21104552 is 25540112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4343 + ... + 7814.

It is an arithmetic number, because the mean of its divisors is an integer number (1458960).

Almost surely, 2^21104552 is an apocalyptic number.

It is an amenable number.

21104552 is an abundant number, since it is smaller than the sum of its proper divisors (25582168).

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

21104552 is a wasteful number, since it uses less digits than its factorization.

21104552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12201 (or 12197 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 21104552 is about 4593.9690900136. The cubic root of 21104552 is about 276.3495186851.

Adding to 21104552 its reverse (25540112), we get a palindrome (46644664).

The spelling of 21104552 in words is "twenty-one million, one hundred four thousand, five hundred fifty-two".