21830650 has 24 divisors (see below), whose sum is σ = 41168124. Its totient is φ = 8611200.

The previous prime is 21830621. The next prime is 21830659. The reversal of 21830650 is 5603812.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2812329 + 19018321 = 1677^2 + 4361^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (21830659) 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, 660 + ... + 6640.

Almost surely, 2^21830650 is an apocalyptic number.

21830650 is a deficient number, since it is larger than the sum of its proper divisors (19337474).

21830650 is a wasteful number, since it uses less digits than its factorization.

21830650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066 (or 6061 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 21830650 is about 4672.3281134783. The cubic root of 21830650 is about 279.4831024845.

The spelling of 21830650 in words is "twenty-one million, eight hundred thirty thousand, six hundred fifty".