21652996 has 6 divisors (see below), whose sum is σ = 37892750. Its totient is φ = 10826496.

The previous prime is 21652963. The next prime is 21652997. The reversal of 21652996 is 69925612.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 1132096 = 4530^2 + 1064^2 .

It is not an unprimeable number, because it can be changed into a prime (21652997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2706621 + ... + 2706628.

Almost surely, 2^21652996 is an apocalyptic number.

It is an amenable number.

21652996 is a deficient number, since it is larger than the sum of its proper divisors (16239754).

21652996 is a wasteful number, since it uses less digits than its factorization.

21652996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413253 (or 5413251 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 21652996 is about 4653.2779843891. The cubic root of 21652996 is about 278.7229084786.

The spelling of 21652996 in words is "twenty-one million, six hundred fifty-two thousand, nine hundred ninety-six".