20973472 has 24 divisors (see below), whose sum is σ = 44468676. Its totient is φ = 9679872.

The previous prime is 20973457. The next prime is 20973499. The reversal of 20973472 is 27437902.

It can be written as a sum of positive squares in 2 ways, for example, as 19324816 + 1648656 = 4396^2 + 1284^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 24793 + ... + 25624.

Almost surely, 2^20973472 is an apocalyptic number.

It is an amenable number.

20973472 is an abundant number, since it is smaller than the sum of its proper divisors (23495204).

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

20973472 is a wasteful number, since it uses less digits than its factorization.

20973472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50440 (or 50432 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 20973472 is about 4579.6803381896. The cubic root of 20973472 is about 275.7761960818.

The spelling of 20973472 in words is "twenty million, nine hundred seventy-three thousand, four hundred seventy-two".