20979232 has 12 divisors (see below), whose sum is σ = 41302926. Its totient is φ = 10489600.

The previous prime is 20979223. The next prime is 20979239. The reversal of 20979232 is 23297902.

It can be written as a sum of positive squares in only one way, i.e., 20466576 + 512656 = 4524^2 + 716^2 .

It is not an unprimeable number, because it can be changed into a prime (20979239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327769 + ... + 327832.

Almost surely, 2^20979232 is an apocalyptic number.

It is an amenable number.

20979232 is a deficient number, since it is larger than the sum of its proper divisors (20323694).

20979232 is an equidigital number, since it uses as much as digits as its factorization.

20979232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655611 (or 655603 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20979232 is about 4580.3091598712. The cubic root of 20979232 is about 275.8014394861.

The spelling of 20979232 in words is "twenty million, nine hundred seventy-nine thousand, two hundred thirty-two".