21232996 has 6 divisors (see below), whose sum is σ = 37157750. Its totient is φ = 10616496.

The previous prime is 21232993. The next prime is 21233011. The reversal of 21232996 is 69923212.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 1784896 = 4410^2 + 1336^2 .

It is not an unprimeable number, because it can be changed into a prime (21232993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2654121 + ... + 2654128.

Almost surely, 2^21232996 is an apocalyptic number.

It is an amenable number.

21232996 is a deficient number, since it is larger than the sum of its proper divisors (15924754).

21232996 is a wasteful number, since it uses less digits than its factorization.

21232996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308253 (or 5308251 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 21232996 is about 4607.9275167910. The cubic root of 21232996 is about 276.9090136337.

The spelling of 21232996 in words is "twenty-one million, two hundred thirty-two thousand, nine hundred ninety-six".