21902848 has 40 divisors (see below), whose sum is σ = 47753640. Its totient is φ = 9953280.

The previous prime is 21902827. The next prime is 21902849. The reversal of 21902848 is 84820912.

It is a super-2 number, since 2×21902848² = 959469501022208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21902849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3688 + ... + 7576.

It is an arithmetic number, because the mean of its divisors is an integer number (1193841).

Almost surely, 2^21902848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21902848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23876820).

21902848 is an abundant number, since it is smaller than the sum of its proper divisors (25850792).

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

21902848 is an equidigital number, since it uses as much as digits as its factorization.

21902848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918 (or 3902 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 21902848 is about 4680.0478630031. The cubic root of 21902848 is about 279.7908642407.

The spelling of 21902848 in words is "twenty-one million, nine hundred two thousand, eight hundred forty-eight".