20649196 has 6 divisors (see below), whose sum is σ = 36136100. Its totient is φ = 10324596.

The previous prime is 20649191. The next prime is 20649217. The reversal of 20649196 is 69194602.

It is not an unprimeable number, because it can be changed into a prime (20649191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2581146 + ... + 2581153.

Almost surely, 2^20649196 is an apocalyptic number.

It is an amenable number.

20649196 is a deficient number, since it is larger than the sum of its proper divisors (15486904).

20649196 is a wasteful number, since it uses less digits than its factorization.

20649196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5162303 (or 5162301 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 20649196 is about 4544.1386422511. The cubic root of 20649196 is about 274.3475264234.

The spelling of 20649196 in words is "twenty million, six hundred forty-nine thousand, one hundred ninety-six".