21848372 has 48 divisors (see below), whose sum is σ = 47453952. Its totient is φ = 8570880.

The previous prime is 21848369. The next prime is 21848401. The reversal of 21848372 is 27384812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70097 + ... + 70407.

It is an arithmetic number, because the mean of its divisors is an integer number (988624).

Almost surely, 2^21848372 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 21848372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23726976).

21848372 is an abundant number, since it is smaller than the sum of its proper divisors (25605580).

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

21848372 is a wasteful number, since it uses less digits than its factorization.

21848372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 526 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 21848372 is about 4674.2242137065. The cubic root of 21848372 is about 279.5587096373.

The spelling of 21848372 in words is "twenty-one million, eight hundred forty-eight thousand, three hundred seventy-two".