21483850 has 12 divisors (see below), whose sum is σ = 39960054. Its totient is φ = 8593520.

The previous prime is 21483829. The next prime is 21483853. The reversal of 21483850 is 5838412.

It can be written as a sum of positive squares in 3 ways, for example, as 7845601 + 13638249 = 2801^2 + 3693^2 .

It is not an unprimeable number, because it can be changed into a prime (21483853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214789 + ... + 214888.

Almost surely, 2^21483850 is an apocalyptic number.

21483850 is a deficient number, since it is larger than the sum of its proper divisors (18476204).

21483850 is a wasteful number, since it uses less digits than its factorization.

21483850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429689 (or 429684 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 21483850 is about 4635.0674213004. The cubic root of 21483850 is about 277.9952468866.

The spelling of 21483850 in words is "twenty-one million, four hundred eighty-three thousand, eight hundred fifty".