21322196 has 48 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 8633856.

The previous prime is 21322181. The next prime is 21322201. The reversal of 21322196 is 69122312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72626 + ... + 72918.

It is an arithmetic number, because the mean of its divisors is an integer number (938448).

Almost surely, 2^21322196 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 21322196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22522752).

21322196 is an abundant number, since it is smaller than the sum of its proper divisors (23723308).

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

21322196 is a wasteful number, since it uses less digits than its factorization.

21322196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 438 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 21322196 is about 4617.5963444199. The cubic root of 21322196 is about 277.2962376162.

The spelling of 21322196 in words is "twenty-one million, three hundred twenty-two thousand, one hundred ninety-six".