21096244 has 48 divisors (see below), whose sum is σ = 42900480. Its totient is φ = 8997120.

The previous prime is 21096241. The next prime is 21096259. The reversal of 21096244 is 44269012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21096241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36792 + ... + 37360.

It is an arithmetic number, because the mean of its divisors is an integer number (893760).

Almost surely, 2^21096244 is an apocalyptic number.

It is an amenable number.

21096244 is an abundant number, since it is smaller than the sum of its proper divisors (21804236).

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

21096244 is a wasteful number, since it uses less digits than its factorization.

21096244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 21096244 is about 4593.0647720231. The cubic root of 21096244 is about 276.3132514202.

The spelling of 21096244 in words is "twenty-one million, ninety-six thousand, two hundred forty-four".