21230650 has 24 divisors (see below), whose sum is σ = 45131040. Its totient is φ = 7278960.

The previous prime is 21230641. The next prime is 21230689. The reversal of 21230650 is 5603212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29980 + ... + 30679.

It is an arithmetic number, because the mean of its divisors is an integer number (1880460).

Almost surely, 2^21230650 is an apocalyptic number.

21230650 is an abundant number, since it is smaller than the sum of its proper divisors (23900390).

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

21230650 is a wasteful number, since it uses less digits than its factorization.

21230650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60678 (or 60673 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 21230650 is about 4607.6729484632. The cubic root of 21230650 is about 276.8988148457.

Adding to 21230650 its reverse (5603212), we get a palindrome (26833862).

The spelling of 21230650 in words is "twenty-one million, two hundred thirty thousand, six hundred fifty".