20497924 has 12 divisors (see below), whose sum is σ = 35904204. Its totient is φ = 10239584.

The previous prime is 20497921. The next prime is 20497993. The reversal of 20497924 is 42979402.

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 14197824 = 2510^2 + 3768^2 .

It is not an unprimeable number, because it can be changed into a prime (20497921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5454 + ... + 8410.

It is an arithmetic number, because the mean of its divisors is an integer number (2992017).

Almost surely, 2^20497924 is an apocalyptic number.

It is an amenable number.

20497924 is a deficient number, since it is larger than the sum of its proper divisors (15406280).

20497924 is a wasteful number, since it uses less digits than its factorization.

20497924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694 (or 4692 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20497924 is about 4527.4633074162. The cubic root of 20497924 is about 273.6759448843.

The spelling of 20497924 in words is "twenty million, four hundred ninety-seven thousand, nine hundred twenty-four".