20695656 has 16 divisors (see below), whose sum is σ = 51739200. Its totient is φ = 6898544.

The previous prime is 20695643. The next prime is 20695657. The reversal of 20695656 is 65659602.

It is not an unprimeable number, because it can be changed into a prime (20695657) 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 in 3 ways as a sum of consecutive naturals, for example, 431136 + ... + 431183.

It is an arithmetic number, because the mean of its divisors is an integer number (3233700).

Almost surely, 2^20695656 is an apocalyptic number.

It is an amenable number.

20695656 is an abundant number, since it is smaller than the sum of its proper divisors (31043544).

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

20695656 is a wasteful number, since it uses less digits than its factorization.

20695656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862328 (or 862324 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 20695656 is about 4549.2478499198. The cubic root of 20695656 is about 274.5531298847.

The spelling of 20695656 in words is "twenty million, six hundred ninety-five thousand, six hundred fifty-six".