21896496 has 60 divisors (see below), whose sum is σ = 62149048. Its totient is φ = 7195392.

The previous prime is 21896491. The next prime is 21896507. The reversal of 21896496 is 69469812.

It is a happy number.

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 (21896491) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9471 + ... + 11553.

Almost surely, 2^21896496 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 21896496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31074524).

21896496 is an abundant number, since it is smaller than the sum of its proper divisors (40252552).

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

21896496 is a wasteful number, since it uses less digits than its factorization.

21896496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170 (or 2161 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 21896496 is about 4679.3691882560. The cubic root of 21896496 is about 279.7638144342.

The spelling of 21896496 in words is "twenty-one million, eight hundred ninety-six thousand, four hundred ninety-six".