21852984 has 32 divisors (see below), whose sum is σ = 54810000. Its totient is φ = 7260672.

The previous prime is 21852953. The next prime is 21852989. The reversal of 21852984 is 48925812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21852989) 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 7 ways as a sum of consecutive naturals, for example, 7072 + ... + 9680.

Almost surely, 2^21852984 is an apocalyptic number.

21852984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21852984 is an abundant number, since it is smaller than the sum of its proper divisors (32957016).

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

21852984 is a wasteful number, since it uses less digits than its factorization.

21852984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967 (or 2963 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 21852984 is about 4674.7175315734. The cubic root of 21852984 is about 279.5783790519.

The spelling of 21852984 in words is "twenty-one million, eight hundred fifty-two thousand, nine hundred eighty-four".