21233650 has 24 divisors (see below), whose sum is σ = 39644784. Its totient is φ = 8461200.

The previous prime is 21233647. The next prime is 21233651. The reversal of 21233650 is 5633212.

It is not an unprimeable number, because it can be changed into a prime (21233651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15909 + ... + 17191.

It is an arithmetic number, because the mean of its divisors is an integer number (1651866).

Almost surely, 2^21233650 is an apocalyptic number.

21233650 is a deficient number, since it is larger than the sum of its proper divisors (18411134).

21233650 is a wasteful number, since it uses less digits than its factorization.

21233650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626 (or 1621 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 21233650 is about 4607.9984809025. The cubic root of 21233650 is about 276.9118566402.

Adding to 21233650 its reverse (5633212), we get a palindrome (26866862).

The spelling of 21233650 in words is "twenty-one million, two hundred thirty-three thousand, six hundred fifty".