20651168 has 24 divisors (see below), whose sum is σ = 40769568. Its totient is φ = 10297024.

The previous prime is 20651159. The next prime is 20651173. The reversal of 20651168 is 86115602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20651168.

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 in 3 ways as a sum of consecutive naturals, for example, 15455 + ... + 16737.

It is an arithmetic number, because the mean of its divisors is an integer number (1698732).

Almost surely, 2^20651168 is an apocalyptic number.

It is an amenable number.

20651168 is a deficient number, since it is larger than the sum of its proper divisors (20118400).

20651168 is a wasteful number, since it uses less digits than its factorization.

20651168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20651168 is about 4544.3556198872. The cubic root of 20651168 is about 274.3562595496.

The spelling of 20651168 in words is "twenty million, six hundred fifty-one thousand, one hundred sixty-eight".