21968050 has 24 divisors (see below), whose sum is σ = 44004996. Its totient is φ = 8111040.

The previous prime is 21968003. The next prime is 21968053. The reversal of 21968050 is 5086912.

It can be written as a sum of positive squares in 6 ways, for example, as 3279721 + 18688329 = 1811^2 + 4323^2 .

It is not an unprimeable number, because it can be changed into a prime (21968053) by changing a digit.

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, 16249 + ... + 17548.

Almost surely, 2^21968050 is an apocalyptic number.

21968050 is an abundant number, since it is smaller than the sum of its proper divisors (22036946).

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

21968050 is a wasteful number, since it uses less digits than its factorization.

21968050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33822 (or 33817 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 21968050 is about 4687.0086409137. The cubic root of 21968050 is about 280.0682231717.

The spelling of 21968050 in words is "twenty-one million, nine hundred sixty-eight thousand, fifty".