21845350 has 24 divisors (see below), whose sum is σ = 41245128. Its totient is φ = 8606400.

The previous prime is 21845311. The next prime is 21845353. The reversal of 21845350 is 5354812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21845353) 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, 90 + ... + 6610.

It is an arithmetic number, because the mean of its divisors is an integer number (1718547).

Almost surely, 2^21845350 is an apocalyptic number.

21845350 is a deficient number, since it is larger than the sum of its proper divisors (19399778).

21845350 is a wasteful number, since it uses less digits than its factorization.

21845350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600 (or 6595 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 21845350 is about 4673.9009403281. The cubic root of 21845350 is about 279.5458198078.

The spelling of 21845350 in words is "twenty-one million, eight hundred forty-five thousand, three hundred fifty".