21112496 has 40 divisors (see below), whose sum is σ = 44245680. Its totient is φ = 9725184.

The previous prime is 21112433. The next prime is 21112547. The reversal of 21112496 is 69421112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10310 + ... + 12186.

It is an arithmetic number, because the mean of its divisors is an integer number (1106142).

Almost surely, 2^21112496 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 21112496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22122840).

21112496 is an abundant number, since it is smaller than the sum of its proper divisors (23133184).

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

21112496 is a wasteful number, since it uses less digits than its factorization.

21112496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1935 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 21112496 is about 4594.8336204916. The cubic root of 21112496 is about 276.3841880649.

The spelling of 21112496 in words is "twenty-one million, one hundred twelve thousand, four hundred ninety-six".