21946848 has 96 divisors (see below), whose sum is σ = 71850240. Its totient is φ = 5698560.

The previous prime is 21946831. The next prime is 21946867. The reversal of 21946848 is 84864912.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5908 + ... + 8876.

It is an arithmetic number, because the mean of its divisors is an integer number (748440).

Almost surely, 2^21946848 is an apocalyptic number.

21946848 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21946848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35925120).

21946848 is an abundant number, since it is smaller than the sum of its proper divisors (49903392).

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

21946848 is a wasteful number, since it uses less digits than its factorization.

21946848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000 (or 2992 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 21946848 is about 4684.7463111678. The cubic root of 21946848 is about 279.9780935242.

The spelling of 21946848 in words is "twenty-one million, nine hundred forty-six thousand, eight hundred forty-eight".