21116450 has 24 divisors (see below), whose sum is σ = 39653712. Its totient is φ = 8365520.

The previous prime is 21116411. The next prime is 21116453. The reversal of 21116450 is 5461112.

It is not an unprimeable number, because it can be changed into a prime (21116453) 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, 3377 + ... + 7323.

It is an arithmetic number, because the mean of its divisors is an integer number (1652238).

Almost surely, 2^21116450 is an apocalyptic number.

21116450 is a deficient number, since it is larger than the sum of its proper divisors (18537262).

21116450 is a wasteful number, since it uses less digits than its factorization.

21116450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066 (or 4061 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 21116450 is about 4595.2638661996. The cubic root of 21116450 is about 276.4014409573.

Adding to 21116450 its reverse (5461112), we get a palindrome (26577562).

It can be divided in two parts, 211 and 16450, that added together give a palindrome (16661).

The spelling of 21116450 in words is "twenty-one million, one hundred sixteen thousand, four hundred fifty".