21234496 has 56 divisors (see below), whose sum is σ = 46222920. Its totient is φ = 9633792.

The previous prime is 21234487. The next prime is 21234509. The reversal of 21234496 is 69443212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4260096 + 16974400 = 2064^2 + 4120^2 .

It is a congruent number.

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, 31216 + ... + 31888.

Almost surely, 2^21234496 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 21234496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23111460).

21234496 is an abundant number, since it is smaller than the sum of its proper divisors (24988424).

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

21234496 is a wasteful number, since it uses less digits than its factorization.

21234496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 721 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 21234496 is about 4608.0902768935. The cubic root of 21234496 is about 276.9155342042.

The spelling of 21234496 in words is "twenty-one million, two hundred thirty-four thousand, four hundred ninety-six".