20840696 has 8 divisors (see below), whose sum is σ = 39076320. Its totient is φ = 10420344.

The previous prime is 20840683. The next prime is 20840707. The reversal of 20840696 is 69604802.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302536 + ... + 1302551.

It is an arithmetic number, because the mean of its divisors is an integer number (4884540).

Almost surely, 2^20840696 is an apocalyptic number.

It is an amenable number.

20840696 is a deficient number, since it is larger than the sum of its proper divisors (18235624).

20840696 is a wasteful number, since it uses less digits than its factorization.

20840696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605093 (or 2605089 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 20840696 is about 4565.1611143529. The cubic root of 20840696 is about 275.1930149097.

It can be divided in two parts, 208 and 40696, that added together give a palindrome (40904).

The spelling of 20840696 in words is "twenty million, eight hundred forty thousand, six hundred ninety-six".