20697168 has 20 divisors (see below), whose sum is σ = 53467808. Its totient is φ = 6899040.

The previous prime is 20697167. The next prime is 20697199. The reversal of 20697168 is 86179602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20697167) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 215548 + ... + 215643.

Almost surely, 2^20697168 is an apocalyptic number.

It is an amenable number.

20697168 is an abundant number, since it is smaller than the sum of its proper divisors (32770640).

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

20697168 is a wasteful number, since it uses less digits than its factorization.

20697168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431202 (or 431196 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20697168 is about 4549.4140282019. The cubic root of 20697168 is about 274.5598158969.

The spelling of 20697168 in words is "twenty million, six hundred ninety-seven thousand, one hundred sixty-eight".