21829896 has 96 divisors (see below), whose sum is σ = 66100320. Its totient is φ = 6451200.

The previous prime is 21829861. The next prime is 21829897. The reversal of 21829896 is 69892812.

21829896 = 261² + 262² + ... + 436².

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21829897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33736 + ... + 34376.

It is an arithmetic number, because the mean of its divisors is an integer number (688545).

Almost surely, 2^21829896 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 21829896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33050160).

21829896 is an abundant number, since it is smaller than the sum of its proper divisors (44270424).

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

21829896 is a wasteful number, since it uses less digits than its factorization.

21829896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 700 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 21829896 is about 4672.2474249551. The cubic root of 21829896 is about 279.4798847961.

The spelling of 21829896 in words is "twenty-one million, eight hundred twenty-nine thousand, eight hundred ninety-six".