21849450 has 48 divisors (see below), whose sum is σ = 61930560. Its totient is φ = 4993920.

The previous prime is 21849427. The next prime is 21849463. The reversal of 21849450 is 5494812.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 9355 + ... + 11454.

It is an arithmetic number, because the mean of its divisors is an integer number (1290220).

Almost surely, 2^21849450 is an apocalyptic number.

21849450 is an abundant number, since it is smaller than the sum of its proper divisors (40081110).

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

21849450 is a wasteful number, since it uses less digits than its factorization.

21849450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20831 (or 20826 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 21849450 is about 4674.3395255373. The cubic root of 21849450 is about 279.5633073763.

The spelling of 21849450 in words is "twenty-one million, eight hundred forty-nine thousand, four hundred fifty".