20607668 has 12 divisors (see below), whose sum is σ = 37038372. Its totient is φ = 10025280.

The previous prime is 20607641. The next prime is 20607673. The reversal of 20607668 is 86670602.

It can be written as a sum of positive squares in 2 ways, for example, as 19114384 + 1493284 = 4372^2 + 1222^2 .

It is a congruent number.

It is an unprimeable number.

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, 69473 + ... + 69768.

It is an arithmetic number, because the mean of its divisors is an integer number (3086531).

Almost surely, 2^20607668 is an apocalyptic number.

It is an amenable number.

20607668 is a deficient number, since it is larger than the sum of its proper divisors (16430704).

20607668 is a wasteful number, since it uses less digits than its factorization.

20607668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139282 (or 139280 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20607668 is about 4539.5669396981. The cubic root of 20607668 is about 274.1634877769.

The spelling of 20607668 in words is "twenty million, six hundred seven thousand, six hundred sixty-eight".