20497936 has 20 divisors (see below), whose sum is σ = 39814912. Its totient is φ = 10223136.

The previous prime is 20497921. The next prime is 20497993. The reversal of 20497936 is 63979402.

It is a super-3 number, since 3×20497936³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6025 + ... + 8791.

Almost surely, 2^20497936 is an apocalyptic number.

It is an amenable number.

20497936 is a deficient number, since it is larger than the sum of its proper divisors (19316976).

20497936 is a wasteful number, since it uses less digits than its factorization.

20497936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238 (or 3232 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 20497936 is about 4527.4646326614. The cubic root of 20497936 is about 273.6759982899.

The spelling of 20497936 in words is "twenty million, four hundred ninety-seven thousand, nine hundred thirty-six".